diff --git a/packages/frontend-core/src/components/grid/stores/rows.js b/packages/frontend-core/src/components/grid/stores/rows.js
index 25acad6520..4cfaa1cfd5 100644
--- a/packages/frontend-core/src/components/grid/stores/rows.js
+++ b/packages/frontend-core/src/components/grid/stores/rows.js
@@ -55,10 +55,10 @@ export const deriveStores = context => {
       return $rows.map((row, idx) => ({
         ...row,
         __idx: idx,
-        ...customColumns.reduce((acc, c) => {
-          const fromField = $enrichedSchema[c.related.field]
-          acc[c.name] = getRelatedTableValues(row, c, fromField)
-          return acc
+        ...customColumns.reduce((map, column) => {
+          const fromField = $enrichedSchema[column.related.field]
+          map[column.name] = getRelatedTableValues(row, column, fromField)
+          return map
         }, {}),
       }))
     }
diff --git a/packages/frontend-core/src/utils/relatedColumns.js b/packages/frontend-core/src/utils/relatedColumns.js
index 9d389524fd..f625e83e95 100644
--- a/packages/frontend-core/src/utils/relatedColumns.js
+++ b/packages/frontend-core/src/utils/relatedColumns.js
@@ -40,9 +40,9 @@ export function enrichSchemaWithRelColumns(schema) {
   if (!schema) {
     return
   }
-  const result = Object.keys(schema).reduce((acc, c) => {
-    const field = schema[c]
-    acc[c] = field
+  const result = Object.keys(schema).reduce((result, fieldName) => {
+    const field = schema[fieldName]
+    result[fieldName] = field
 
     if (field.visible !== false && field.columns) {
       const fromSingle =
@@ -54,17 +54,17 @@ export function enrichSchemaWithRelColumns(schema) {
           continue
         }
         const name = `${field.name}.${relColumn}`
-        acc[name] = {
+        result[name] = {
           ...relField,
           name,
-          related: { field: c, subField: relColumn },
+          related: { field: fieldName, subField: relColumn },
           cellRenderType:
             (!fromSingle && columnTypeManyTypeOverrides[relField.type]) ||
             relField.type,
         }
       }
     }
-    return acc
+    return result
   }, {})
 
   return result