diff --git a/packages/server/src/api/controllers/row/utils/basic.ts b/packages/server/src/api/controllers/row/utils/basic.ts
index 02f92e15e9..aed0ba3232 100644
--- a/packages/server/src/api/controllers/row/utils/basic.ts
+++ b/packages/server/src/api/controllers/row/utils/basic.ts
@@ -108,6 +108,11 @@ export function fixArrayTypes(row: Row, table: Table) {
       [FieldType.ARRAY, FieldType.BB_REFERENCE].includes(schema.type) &&
       typeof row[fieldName] === "string"
     ) {
+      // Handling old single user type
+      if (schema.constraints?.type !== "array") {
+        continue
+      }
+
       try {
         row[fieldName] = JSON.parse(row[fieldName])
       } catch (err) {
diff --git a/packages/server/src/integrations/base/sql.ts b/packages/server/src/integrations/base/sql.ts
index e61089ef2c..5ae09d44f2 100644
--- a/packages/server/src/integrations/base/sql.ts
+++ b/packages/server/src/integrations/base/sql.ts
@@ -764,7 +764,10 @@ class SqlQueryBuilder extends SqlTableQueryBuilder {
     field: FieldSchema
   ): field is JsonFieldMetadata | BBReferenceFieldMetadata {
     return (
-      field.type === FieldType.JSON || field.type === FieldType.BB_REFERENCE
+      field.type === FieldType.JSON ||
+      (field.type === FieldType.BB_REFERENCE &&
+        // Handling old single user type
+        field.constraints?.type === "array")
     )
   }