diff --git a/src/controllers/04-product-group-controller.ts b/src/controllers/04-product-group-controller.ts
index 362d155..50b77f7 100644
--- a/src/controllers/04-product-group-controller.ts
+++ b/src/controllers/04-product-group-controller.ts
@@ -227,7 +227,8 @@ export class ProductGroup extends Controller {
     }
 
     let companyBefore = (record.registeredBranch.headOffice || record.registeredBranch).code;
-    let companyAfter = branch ? (branch.headOffice || branch).code : false;
+    let companyAfter =
+      !!body.registeredBranchId && branch ? (branch.headOffice || branch).code : false;
 
     if (companyBefore && companyAfter && companyBefore !== companyAfter) {
       throw new HttpError(