diff --git a/packages/server/src/utilities/rowProcessor/map.ts b/packages/server/src/utilities/rowProcessor/map.ts
index 6c750630a9..6d70102233 100644
--- a/packages/server/src/utilities/rowProcessor/map.ts
+++ b/packages/server/src/utilities/rowProcessor/map.ts
@@ -57,13 +57,6 @@ export const TYPE_TRANSFORM_MAP: any = {
     [undefined]: undefined,
     parse: parseArrayString,
   },
-  [FieldType.BB_REFERENCE_SINGLE]: {
-    "": null,
-    //@ts-ignore
-    [null]: null,
-    //@ts-ignore
-    [undefined]: undefined,
-  },
   [FieldType.STRING]: {
     "": null,
     //@ts-ignore
@@ -127,9 +120,6 @@ export const TYPE_TRANSFORM_MAP: any = {
     [undefined]: undefined,
     parse: parseArrayString,
   },
-  [FieldType.ATTACHMENT_SINGLE]: {
-    "": null,
-  },
   [FieldType.BOOLEAN]: {
     "": null,
     //@ts-ignore
diff --git a/packages/server/src/utilities/rowProcessor/tests/inputProcessing.spec.ts b/packages/server/src/utilities/rowProcessor/tests/inputProcessing.spec.ts
index 81094583e2..244ea3794c 100644
--- a/packages/server/src/utilities/rowProcessor/tests/inputProcessing.spec.ts
+++ b/packages/server/src/utilities/rowProcessor/tests/inputProcessing.spec.ts
@@ -209,10 +209,22 @@ describe("rowProcessor - inputProcessing", () => {
 
       const { row } = await inputProcessing(userId, table, newRow)
 
+      if (userValue === undefined) {
+        // The 'user' field is omitted
+        expect(row).toEqual({
+          name: "Jack",
+        })
+      } else {
+        // The update is processed if null or "". 'user' is changed to an empty array.
+        expect(row).toEqual({
+          name: "Jack",
+          user: [],
+        })
+      }
+
       expect(
         bbReferenceProcessor.processInputBBReferences
       ).not.toHaveBeenCalled()
-      expect(row).toEqual(newRow)
     }
   )