diff --git a/packages/builder/src/builderStore/store/backend.js b/packages/builder/src/builderStore/store/backend.js
index ded766e755..153cba784f 100644
--- a/packages/builder/src/builderStore/store/backend.js
+++ b/packages/builder/src/builderStore/store/backend.js
@@ -13,6 +13,8 @@ import {
   constructHierarchy,
   templateApi,
   isIndex,
+  canDeleteIndex,
+  canDeleteRecord
 } from "../../common/core"
 
 export const getBackendUiStore = () => {
@@ -183,7 +185,7 @@ export const saveCurrentNode = store => () => {
       const defaultIndex = templateApi(state.hierarchy).getNewIndexTemplate(
         cloned.parent()
       )
-      defaultIndex.name = `all_${cloned.collectionName}`
+      defaultIndex.name = `all_${cloned.name}s`
       defaultIndex.allowedRecordNodeIds = [cloned.nodeId]
     }
 
@@ -202,14 +204,27 @@ export const deleteCurrentNode = store => () => {
       ? state.hierarchy.children.find(node => node !== state.currentNode)
       : nodeToDelete.parent()
 
-    const recordOrIndexKey = hierarchyFunctions.isRecord(nodeToDelete) ? "children" : "indexes";
+    const isRecord = hierarchyFunctions.isRecord(nodeToDelete)
+
+    const check = isRecord
+      ? canDeleteRecord(nodeToDelete)
+      : canDeleteIndex(nodeToDelete)
+
+    if (!check.canDelete) {
+      state.errors = check.errors.map(e => ({ error: e }))
+      return state
+    }
+
+    const recordOrIndexKey = isRecord ? "children" : "indexes"
 
     // remove the selected record or index
-    nodeToDelete.parent()[recordOrIndexKey] = remove(
-      nodeToDelete.parent()[recordOrIndexKey],
-      node => node.nodeId === nodeToDelete.nodeId
+    const newCollection = remove(
+      node => node.nodeId === nodeToDelete.nodeId,
+      nodeToDelete.parent()[recordOrIndexKey]
     )
 
+    nodeToDelete.parent()[recordOrIndexKey] = newCollection
+
     state.errors = []
     saveBackend(state)
     return state
diff --git a/packages/builder/src/common/ErrorsBox.svelte b/packages/builder/src/common/ErrorsBox.svelte
index 9ddea77a49..117f3aae5a 100644
--- a/packages/builder/src/common/ErrorsBox.svelte
+++ b/packages/builder/src/common/ErrorsBox.svelte
@@ -5,25 +5,14 @@
 </script>
 
 {#if hasErrors}
-  <div class="error-container">
+  <div uk-alert class="uk-alert-danger">
     {#each errors as error}
-      <div class="error-row">
+      <div>
         {error.field ? `${error.field}: ` : ''}{error.error}
       </div>
     {/each}
-  </div>
+</div>
+
+
 {/if}
 
-<style>
-  .error-container {
-    padding: 10px;
-    border-style: solid;
-    border-color: var(--deletion100);
-    border-radius: var(--borderradiusall);
-    background: var(--deletion75);
-  }
-
-  .error-row {
-    padding: 5px 0px;
-  }
-</style>
diff --git a/packages/builder/src/common/core.js b/packages/builder/src/common/core.js
index dbdd186aa3..2274d9d028 100644
--- a/packages/builder/src/common/core.js
+++ b/packages/builder/src/common/core.js
@@ -9,6 +9,8 @@ import { find, filter, keyBy, flatten, map } from "lodash/fp"
 import { generateSchema } from "../../../core/src/indexing/indexSchemaCreator"
 import { generate } from "shortid"
 
+export { canDeleteIndex } from "../../../core/src/templateApi/canDeleteIndex"
+export { canDeleteRecord } from "../../../core/src/templateApi/canDeleteRecord"
 export { userWithFullAccess } from "../../../core/src/index"
 
 export const pipe = common.$
diff --git a/packages/builder/src/database/ActionsHeader.svelte b/packages/builder/src/database/ActionsHeader.svelte
index c763abc359..f012bd2bb3 100644
--- a/packages/builder/src/database/ActionsHeader.svelte
+++ b/packages/builder/src/database/ActionsHeader.svelte
@@ -31,9 +31,6 @@
     </ActionButton>
   </div>
 
-  {#if $store.errors && $store.errors.length > 0}
-    <ErrorsBox errors={$store.errors} />
-  {/if}
 </div>
 
 <style>
diff --git a/packages/builder/src/database/IndexView.svelte b/packages/builder/src/database/IndexView.svelte
index bcc9a52aed..6028f76e77 100644
--- a/packages/builder/src/database/IndexView.svelte
+++ b/packages/builder/src/database/IndexView.svelte
@@ -6,7 +6,8 @@
   import { store } from "../builderStore"
   import { filter, some, map, compose } from "lodash/fp"
   import { hierarchy as hierarchyFunctions, common } from "../../../core/src"
-
+  import ErrorsBox from "../common/ErrorsBox.svelte"
+  
   const SNIPPET_EDITORS = {
     MAP: "Map",
     FILTER: "Filter",
@@ -49,6 +50,9 @@
 </heading>
 <form class="uk-form-stacked root">
   <h4 class="budibase__label--big">Settings</h4>
+  {#if $store.errors && $store.errors.length > 0}
+    <ErrorsBox errors={$store.errors} />
+  {/if}
   <div class="uk-grid-small" uk-grid>
     <div class="uk-width-1-2@s">
       <Textbox bind:text={index.name} label="Name" />
diff --git a/packages/builder/src/database/ModelDataTable/modals/CreateUser.svelte b/packages/builder/src/database/ModelDataTable/modals/CreateUser.svelte
index cc7e00d1d9..7382c6eab8 100644
--- a/packages/builder/src/database/ModelDataTable/modals/CreateUser.svelte
+++ b/packages/builder/src/database/ModelDataTable/modals/CreateUser.svelte
@@ -20,7 +20,7 @@
     const response = await api.createUser(
       password,
       {
-        username,
+        name:username,
         accessLevels,
         enabled: true,
         temporaryAccessId: ""
diff --git a/packages/builder/src/database/ModelView.svelte b/packages/builder/src/database/ModelView.svelte
index 4d34d35c59..16e2dd85bb 100644
--- a/packages/builder/src/database/ModelView.svelte
+++ b/packages/builder/src/database/ModelView.svelte
@@ -10,6 +10,7 @@
   import { common, hierarchy } from "../../../core/src"
   import { templateApi, pipe, validate } from "../common/core"
   import ActionsHeader from "./ActionsHeader.svelte"
+  import ErrorsBox from "../common/ErrorsBox.svelte"
 
   let record
   let getIndexAllowedRecords
@@ -99,14 +100,15 @@
   </heading>
   {#if !editingField}
     <h4 class="budibase__label--big">Settings</h4>
+
+    {#if $store.errors && $store.errors.length > 0}
+      <ErrorsBox errors={$store.errors} />
+    {/if}
+
     <form class="uk-form-stacked">
 
-      <Textbox label="Name" bind:text={record.name} on:change={nameChanged} />
-
       <div class="horizontal-stack">
-        {#if !record.isSingle}
-          <Textbox label="Collection Name" bind:text={record.collectionName} />
-        {/if}
+        <Textbox label="Name" bind:text={record.name} on:change={nameChanged} />
         <div>
           <label class="uk-form-label">Parent</label>
           <div class="uk-form-controls">
diff --git a/packages/builder/src/nav/DatabasesList.svelte b/packages/builder/src/nav/DatabasesList.svelte
index a1406745a8..c58ac23c84 100644
--- a/packages/builder/src/nav/DatabasesList.svelte
+++ b/packages/builder/src/nav/DatabasesList.svelte
@@ -59,6 +59,7 @@
     font-size: 0.8rem;
     outline: none;
     cursor: pointer;
+    background: rgba(0,0,0,0);
   }
 
   .active {
diff --git a/packages/builder/src/nav/UsersList.svelte b/packages/builder/src/nav/UsersList.svelte
index 275f020a9e..b9db50d970 100644
--- a/packages/builder/src/nav/UsersList.svelte
+++ b/packages/builder/src/nav/UsersList.svelte
@@ -65,6 +65,7 @@
     font-size: 0.8rem;
     outline: none;
     cursor: pointer;
+    background: rgba(0,0,0,0);
   }
 
   .active {
diff --git a/packages/builder/src/userInterface/ComponentsPaneSwitcher.svelte b/packages/builder/src/userInterface/ComponentsPaneSwitcher.svelte
index 12c0206407..e86aa4800d 100644
--- a/packages/builder/src/userInterface/ComponentsPaneSwitcher.svelte
+++ b/packages/builder/src/userInterface/ComponentsPaneSwitcher.svelte
@@ -75,6 +75,7 @@
     font-weight: 400;
     text-transform: uppercase;
     color: var(--secondary60);
+    background: rgba(0,0,0,0);
   }
 
   .switcher > .selected {
diff --git a/packages/builder/src/userInterface/PagesList.svelte b/packages/builder/src/userInterface/PagesList.svelte
index 1c57a00c41..0fd7718ef3 100644
--- a/packages/builder/src/userInterface/PagesList.svelte
+++ b/packages/builder/src/userInterface/PagesList.svelte
@@ -70,6 +70,7 @@
     font-size: 0.8rem;
     outline: none;
     cursor: pointer;
+    background: rgba(0,0,0,0);
   }
 
   .active {
diff --git a/packages/core/src/actionsApi/initialise.js b/packages/core/src/actionsApi/initialise.js
index 6df15994dd..90b27ac2b1 100644
--- a/packages/core/src/actionsApi/initialise.js
+++ b/packages/core/src/actionsApi/initialise.js
@@ -9,7 +9,7 @@ import {
   reduce,
   find,
 } from "lodash/fp"
-import { compileExpression, compileCode } from "../common/compileCode"
+import { compileCode } from "../common/compileCode"
 import { $ } from "../common"
 import { _executeAction } from "./execute"
 import { BadRequestError, NotFoundError } from "../common/errors"
@@ -49,7 +49,7 @@ const subscribeTriggers = (
 
   const shouldRunTrigger = (trigger, eventContext) => {
     if (!trigger.condition) return true
-    const shouldRun = compileExpression(trigger.condition)
+    const shouldRun = compileCode(trigger.condition)
     return shouldRun({ context: eventContext })
   }
 
diff --git a/packages/core/src/common/compileCode.js b/packages/core/src/common/compileCode.js
index 3447d45b5c..8c570d626f 100644
--- a/packages/core/src/common/compileCode.js
+++ b/packages/core/src/common/compileCode.js
@@ -1,13 +1,25 @@
 import {
-  compileExpression as cExp,
   compileCode as cCode,
 } from "@nx-js/compiler-util"
+import { includes } from "lodash/fp"
+
 
 export const compileCode = code => {
   let func
+  let safeCode
+
+  if (includes("return ")(code)) {
+    safeCode = code
+  } else {
+    let trimmed = code.trim()
+    trimmed = trimmed.endsWith(";") 
+    ? trimmed.substring(0, trimmed.length - 1)
+    : trimmed
+    safeCode = `return (${trimmed})`
+  }
 
   try {
-    func = cCode(code)
+    func = cCode(safeCode)
   } catch (e) {
     e.message = `Error compiling code : ${code} : ${e.message}`
     throw e
@@ -15,16 +27,3 @@ export const compileCode = code => {
 
   return func
 }
-
-export const compileExpression = code => {
-  let func
-
-  try {
-    func = cExp(code)
-  } catch (e) {
-    e.message = `Error compiling expression : ${code} : ${e.message}`
-    throw e
-  }
-
-  return func
-}
diff --git a/packages/core/src/indexApi/aggregates.js b/packages/core/src/indexApi/aggregates.js
index 94344d6ad4..178f37f45a 100644
--- a/packages/core/src/indexApi/aggregates.js
+++ b/packages/core/src/indexApi/aggregates.js
@@ -1,5 +1,5 @@
 import { has, isNumber, isUndefined } from "lodash/fp"
-import { compileExpression, compileCode } from "@nx-js/compiler-util"
+import { compileCode } from "../common/compileCode"
 import { safeKey, apiWrapper, events, isNonEmptyString } from "../common"
 import { iterateIndex } from "../indexing/read"
 import {
@@ -147,7 +147,7 @@ const applyItemToAggregateResult = (indexNode, result, item) => {
     const thisGroupResult = result[aggGroup.name]
 
     if (isNonEmptyString(aggGroup.condition)) {
-      if (!compileExpression(aggGroup.condition)({ record: item })) {
+      if (!compileCode(aggGroup.condition)({ record: item })) {
         continue
       }
     }
diff --git a/packages/core/src/indexing/evaluate.js b/packages/core/src/indexing/evaluate.js
index db7f0d0236..aaa2e6f44a 100644
--- a/packages/core/src/indexing/evaluate.js
+++ b/packages/core/src/indexing/evaluate.js
@@ -1,5 +1,5 @@
-import { compileExpression, compileCode } from "@nx-js/compiler-util"
-import { isUndefined, keys, cloneDeep, isFunction } from "lodash/fp"
+import { compileCode } from "../common/compileCode"
+import { isUndefined, keys, cloneDeep, isFunction, includes } from "lodash/fp"
 import { defineError } from "../common"
 
 export const filterEval = "FILTER_EVALUATE"
@@ -16,7 +16,7 @@ const getEvaluateResult = () => ({
   result: null,
 })
 
-export const compileFilter = index => compileExpression(index.filter)
+export const compileFilter = index => compileCode(index.filter)
 
 export const compileMap = index => compileCode(index.map)
 
@@ -46,6 +46,9 @@ export const mapRecord = (record, index) => {
     if (isFunction(mapped[key])) {
       delete mapped[key]
     }
+    if (key === "IsNew") {
+      delete mapped.IsNew
+    }
   }
 
   mapped.key = record.key
diff --git a/packages/core/src/indexing/sharding.js b/packages/core/src/indexing/sharding.js
index a9b5ded1d7..0b8eaaf97e 100644
--- a/packages/core/src/indexing/sharding.js
+++ b/packages/core/src/indexing/sharding.js
@@ -1,4 +1,4 @@
-import { compileCode } from "@nx-js/compiler-util"
+import { compileCode } from "../common/compileCode"
 import { filter, includes, map, last } from "lodash/fp"
 import {
   getActualKeyOfParent,
diff --git a/packages/core/src/recordApi/validate.js b/packages/core/src/recordApi/validate.js
index b2949b5bf2..052a92680e 100644
--- a/packages/core/src/recordApi/validate.js
+++ b/packages/core/src/recordApi/validate.js
@@ -1,5 +1,5 @@
 import { map, reduce, filter, isEmpty, flatten, each } from "lodash/fp"
-import { compileExpression } from "@nx-js/compiler-util"
+import { compileCode } from "../common/compileCode"
 import _ from "lodash"
 import { getExactNodeForKey } from "../templateApi/hierarchy"
 import { validateFieldParse, validateTypeConstraints } from "../types"
@@ -35,7 +35,7 @@ const validateAllTypeConstraints = async (record, recordNode, context) => {
 
 const runRecordValidationRules = (record, recordNode) => {
   const runValidationRule = rule => {
-    const isValid = compileExpression(rule.expressionWhenValid)
+    const isValid = compileCode(rule.expressionWhenValid)
     const expressionContext = { record, _ }
     return isValid(expressionContext)
       ? { valid: true }
diff --git a/packages/core/src/templateApi/canDeleteIndex.js b/packages/core/src/templateApi/canDeleteIndex.js
index 806bd8fb95..d99022c8e8 100644
--- a/packages/core/src/templateApi/canDeleteIndex.js
+++ b/packages/core/src/templateApi/canDeleteIndex.js
@@ -23,7 +23,7 @@ export const canDeleteIndex = indexNode => {
       }
       return obj
     },[]),
-    map(f => `field ${f.name} on record ${f.record.name} uses this index as a reference`)
+    map(f => `field "${f.name}" on record "${f.record.name}" uses this index as a reference`)
   ])
 
   const lookupIndexes = $(flatHierarchy,[
@@ -37,7 +37,7 @@ export const canDeleteIndex = indexNode => {
       }
       return obj
     },[]),
-    map(f => `field ${f.name} on record ${f.record.name} uses this index as a lookup`)
+    map(f => `field "${f.name}" on record "${f.record.name}" uses this index as a lookup`)
   ])
 
   const errors = [
diff --git a/packages/core/src/templateApi/canDeleteRecord.js b/packages/core/src/templateApi/canDeleteRecord.js
index c438bfb58d..f9b83b12df 100644
--- a/packages/core/src/templateApi/canDeleteRecord.js
+++ b/packages/core/src/templateApi/canDeleteRecord.js
@@ -20,15 +20,14 @@ export const canDeleteRecord = recordNode => {
   ])
 
   const belongsToAncestor = i => 
-    ancestors.includes(i.parent())
-  
+    ancestors.includes(i.parent())  
   
   const errorsForNode = node => {
     const errorsThisNode = $(flatHierarchy, [
       filter(i => isAncestorIndex(i) 
                 && belongsToAncestor(i) 
                 && includes(node.nodeId)(i.allowedRecordNodeIds)),
-      map(i => `index ${i.name} indexes this record. Please remove the record from allowedRecordIds, or delete the index`)
+      map(i => `index "${i.name}" indexes this record. Please remove the record from the index, or delete the index`)
     ])
 
     for (let child of node.children) {
@@ -40,5 +39,7 @@ export const canDeleteRecord = recordNode => {
     return errorsThisNode    
   }
 
-  return errorsForNode(recordNode)
+  const errors =  errorsForNode(recordNode)
+
+  return { errors, canDelete: errors.length === 0 }
 }
\ No newline at end of file
diff --git a/packages/core/src/templateApi/createNodes.js b/packages/core/src/templateApi/createNodes.js
index 113c6ff0ea..804445b4e9 100644
--- a/packages/core/src/templateApi/createNodes.js
+++ b/packages/core/src/templateApi/createNodes.js
@@ -160,16 +160,17 @@ export const getNewRootLevel = () =>
   })
 
 const _getNewRecordTemplate = (parent, name, createDefaultIndex, isSingle) => {
+  const nodeId = getNodeId(parent)
   const node = constructNode(parent, {
     name,
     type: "record",
     fields: [],
     children: [],
     validationRules: [],
-    nodeId: getNodeId(parent),
+    nodeId: nodeId,
     indexes: [],
     estimatedRecordCount: isRecord(parent) ? 500 : 1000000,
-    collectionName: "",
+    collectionName: (nodeId || "").toString(),
     isSingle,
   })
 
diff --git a/packages/core/src/templateApi/validate.js b/packages/core/src/templateApi/validate.js
index 1b3afa84d1..14e4edbba9 100644
--- a/packages/core/src/templateApi/validate.js
+++ b/packages/core/src/templateApi/validate.js
@@ -11,7 +11,7 @@ import {
   isEmpty,
   has,
 } from "lodash/fp"
-import { compileExpression, compileCode } from "@nx-js/compiler-util"
+import { compileCode } from "../common/compileCode"
 import {
   $,
   isSomething,
@@ -73,7 +73,7 @@ const aggregateGroupRules = [
     "condition does not compile",
     a =>
       isEmpty(a.condition) ||
-      executesWithoutException(() => compileExpression(a.condition))
+      executesWithoutException(() => compileCode(a.condition))
   ),
 ]
 
@@ -196,7 +196,7 @@ const triggerRules = actions => [
     t => {
       if (!t.condition) return true
       try {
-        compileExpression(t.condition)
+        compileCode(t.condition)
         return true
       } catch (_) {
         return false
diff --git a/packages/core/src/templateApi/validateAggregate.js b/packages/core/src/templateApi/validateAggregate.js
index 1e790d624a..e0fc4e9a94 100644
--- a/packages/core/src/templateApi/validateAggregate.js
+++ b/packages/core/src/templateApi/validateAggregate.js
@@ -1,5 +1,5 @@
 import { flatten, map, isEmpty } from "lodash/fp"
-import { compileCode } from "@nx-js/compiler-util"
+import { compileCode } from "../common/compileCode"
 import { isNonEmptyString, executesWithoutException, $ } from "../common"
 import { applyRuleSet, makerule } from "../common/validationCommon"
 
diff --git a/packages/core/test/templateApi.canDelete.spec.js b/packages/core/test/templateApi.canDelete.spec.js
index 69fff08f7a..8751068ba3 100644
--- a/packages/core/test/templateApi.canDelete.spec.js
+++ b/packages/core/test/templateApi.canDelete.spec.js
@@ -2,6 +2,7 @@ import {
   setupApphierarchy,
   basicAppHierarchyCreator_WithFields,
   stubEventHandler,
+  basicAppHierarchyCreator_WithFields_AndIndexes,
 } from "./specHelpers"
 import { canDeleteIndex } from "../src/templateApi/canDeleteIndex"
 import { canDeleteRecord } from "../src/templateApi/canDeleteRecord"
@@ -49,15 +50,37 @@ describe("canDeleteIndex", () => {
 
 
 describe("canDeleteRecord", () => {
-  it("should return no errors when deletion is valid", () => {
+  it("should return no errors when deletion is valid", async () => {
     const { appHierarchy } = await setupApphierarchy(
       basicAppHierarchyCreator_WithFields
     )
 
-    appHierarchy.root.
-    const result = canDeleteIndex(appHierarchy.customerRecord)
+    appHierarchy.root.indexes = appHierarchy.root.indexes.filter(i => !i.allowedRecordNodeIds.includes(appHierarchy.customerRecord.nodeId))
+    const result = canDeleteRecord(appHierarchy.customerRecord)
 
     expect(result.canDelete).toBe(true)
     expect(result.errors).toEqual([])
   })
+
+  it("should return errors when record is referenced by hierarchal index", async () => {
+    const { appHierarchy } = await setupApphierarchy(
+      basicAppHierarchyCreator_WithFields
+    )
+
+    const result = canDeleteRecord(appHierarchy.customerRecord)
+
+    expect(result.canDelete).toBe(false)
+    expect(result.errors.some(e => e.includes("customer_index"))).toBe(true)
+  })
+
+  it("should return errors when record has a child which cannot be deleted", async () => {
+    const { appHierarchy } = await setupApphierarchy(
+      basicAppHierarchyCreator_WithFields_AndIndexes
+    )
+
+    const result = canDeleteRecord(appHierarchy.customerRecord)
+
+    expect(result.canDelete).toBe(false)
+    expect(result.errors.some(e => e.includes("Outstanding Invoices"))).toBe(true)
+  })
 })
\ No newline at end of file
diff --git a/packages/core/test/templateApi.constructHeirarchy.spec.js b/packages/core/test/templateApi.constructHeirarchy.spec.js
index 44991ed403..1435f5dbec 100644
--- a/packages/core/test/templateApi.constructHeirarchy.spec.js
+++ b/packages/core/test/templateApi.constructHeirarchy.spec.js
@@ -25,7 +25,7 @@ describe("hierarchy node creation", () => {
     expect(record.validationRules).toEqual([])
     expect(record.indexes).toEqual([])
     expect(record.parent()).toBe(root)
-    expect(record.collectionName).toBe("")
+    expect(record.collectionName).toBe(record.nodeId.toString())
     expect(record.estimatedRecordCount).toBe(1000000)
     expect(record.isSingle).toBe(false)
 
diff --git a/packages/server/middleware/routers.js b/packages/server/middleware/routers.js
index 00e2deff9c..b41fdeeb52 100644
--- a/packages/server/middleware/routers.js
+++ b/packages/server/middleware/routers.js
@@ -171,6 +171,7 @@ module.exports = (config, app) => {
         ctx.request.body.appDefinition,
         ctx.request.body.accessLevels
       )
+      ctx.master.deleteLatestPackageFromCache(ctx.params.appname)
       ctx.response.status = StatusCodes.OK
     })
     .post("/_builder/api/:appname/pages/:pageName", async ctx => {
diff --git a/packages/server/utilities/createAppPackage.js b/packages/server/utilities/createAppPackage.js
index 3aaa6ce09f..9a993a4ae4 100644
--- a/packages/server/utilities/createAppPackage.js
+++ b/packages/server/utilities/createAppPackage.js
@@ -5,12 +5,16 @@ const { getRuntimePackageDirectory } = require("../utilities/runtimePackages")
 const injectPlugins = require("./injectedPlugins")
 const { cwd } = require("process")
 
+const appDefinitionPath = appPath => join(appPath, "appDefinition.json")
+const pluginsPath = appPath => join(appPath, "plugins.js")
+const accessLevelsPath = appPath => join(appPath, "access_levels.json")
+
 const createAppPackage = (context, appPath) => {
-  const appDefModule = require(join(appPath, "appDefinition.json"))
+  const appDefModule = require(appDefinitionPath(appPath))
 
-  const pluginsModule = require(join(appPath, "plugins.js"))
+  const pluginsModule = require(pluginsPath(appPath))
 
-  const accessLevels = require(join(appPath, "access_levels.json"))
+  const accessLevels = require(accessLevelsPath(appPath))
 
   return {
     appDefinition: appDefModule,
@@ -87,3 +91,11 @@ module.exports.applictionVersionPackage = async (
   await injectPlugins(pkg, context.master, appname, instanceKey)
   return pkg
 }
+
+module.exports.deleteCachedPackage = (context, appname, versionId) => {
+  const appPath = applictionVersionPath(context, appname, versionId)
+
+  delete require.cache[resolve(appDefinitionPath(appPath))]
+  delete require.cache[resolve(pluginsPath(appPath))]
+  delete require.cache[resolve(accessLevelsPath(appPath))]
+}
diff --git a/packages/server/utilities/masterAppInternal.js b/packages/server/utilities/masterAppInternal.js
index 88a7bdfb75..e02862f61c 100644
--- a/packages/server/utilities/masterAppInternal.js
+++ b/packages/server/utilities/masterAppInternal.js
@@ -11,8 +11,9 @@ const {
   masterAppPackage,
   applictionVersionPackage,
   applictionVersionPublicPaths,
+  deleteCachedPackage,
 } = require("../utilities/createAppPackage")
-const { determineVersionId } = require("./runtimePackages")
+const { determineVersionId, LATEST_VERSIONID } = require("./runtimePackages")
 
 const isMaster = appname => appname === "_master"
 
@@ -345,6 +346,10 @@ module.exports = async context => {
     await bb.recordApi.save(userInMaster)
   }
 
+  const deleteLatestPackageFromCache = (appname) => {
+    deleteCachedPackage(context, appname, LATEST_VERSIONID)
+  }
+
   const listApplications = () => values(applications)
 
   return {
@@ -364,5 +369,6 @@ module.exports = async context => {
     getFullAccessApiForInstanceId,
     getFullAccessApiForMaster,
     getApplicationWithInstances,
+    deleteLatestPackageFromCache,
   }
 }