diff --git a/packages/server/src/api/controllers/table/utils.ts b/packages/server/src/api/controllers/table/utils.ts
index 96c01a15b8..743cce410b 100644
--- a/packages/server/src/api/controllers/table/utils.ts
+++ b/packages/server/src/api/controllers/table/utils.ts
@@ -15,7 +15,7 @@ import { getViews, saveView } from "../view/utils"
 import viewTemplate from "../view/viewBuilder"
 import { cloneDeep } from "lodash/fp"
 import { quotas } from "@budibase/pro"
-import { context, events, features } from "@budibase/backend-core"
+import { context, events, features, HTTPError } from "@budibase/backend-core"
 import {
   AutoFieldSubType,
   Database,
@@ -145,14 +145,21 @@ export async function importToRows(
     // the real schema of the table passed in, not the clone used for
     // incrementing auto IDs
     for (const [fieldName, schema] of Object.entries(originalTable.schema)) {
-      const rowVal = Array.isArray(row[fieldName])
-        ? row[fieldName]
-        : [row[fieldName]]
+      if (schema.type === FieldType.LINK) {
+        throw new HTTPError(
+          `Can't bulk import relationship fields for internal databases, found value in field "${fieldName}"`,
+          400
+        )
+      }
+
       if (
         (schema.type === FieldType.OPTIONS ||
           schema.type === FieldType.ARRAY) &&
         row[fieldName]
       ) {
+        const rowVal = Array.isArray(row[fieldName])
+          ? row[fieldName]
+          : [row[fieldName]]
         let merged = [...schema.constraints!.inclusion!, ...rowVal]
         let superSet = new Set(merged)
         schema.constraints!.inclusion = Array.from(superSet)
diff --git a/packages/server/src/api/routes/tests/row.spec.ts b/packages/server/src/api/routes/tests/row.spec.ts
index cf3c87c430..a100a386d9 100644
--- a/packages/server/src/api/routes/tests/row.spec.ts
+++ b/packages/server/src/api/routes/tests/row.spec.ts
@@ -1823,6 +1823,39 @@ describe.each([
         expect(row.autoId).toEqual(3)
       })
 
+    isInternal &&
+      it("should reject bulkImporting relationship fields", async () => {
+        const table1 = await config.api.table.save(saveTableRequest())
+        const table2 = await config.api.table.save(
+          saveTableRequest({
+            schema: {
+              relationship: {
+                name: "relationship",
+                type: FieldType.LINK,
+                tableId: table1._id!,
+                relationshipType: RelationshipType.ONE_TO_MANY,
+                fieldName: "relationship",
+              },
+            },
+          })
+        )
+
+        const table1Row1 = await config.api.row.save(table1._id!, {})
+        await config.api.row.bulkImport(
+          table2._id!,
+          {
+            rows: [{ relationship: [table1Row1._id!] }],
+          },
+          {
+            status: 400,
+            body: {
+              message:
+                'Can\'t bulk import relationship fields for internal databases, found value in field "relationship"',
+            },
+          }
+        )
+      })
+
     it("should be able to bulkImport rows", async () => {
       const table = await config.api.table.save(
         saveTableRequest({