diff --git a/src/controllers/04-product-group-controller.ts b/src/controllers/04-product-group-controller.ts
index 50b77f7..4ecc7f1 100644
--- a/src/controllers/04-product-group-controller.ts
+++ b/src/controllers/04-product-group-controller.ts
@@ -230,21 +230,34 @@ export class ProductGroup extends Controller {
     let companyAfter =
       !!body.registeredBranchId && branch ? (branch.headOffice || branch).code : false;
 
-    if (companyBefore && companyAfter && companyBefore !== companyAfter) {
-      throw new HttpError(
-        HttpStatus.BAD_REQUEST,
-        "Cannot move between different headoffice",
-        "crossCompanyNotPermit",
-      );
-    }
-
-    const result = await prisma.productGroup.update({
-      include: {
-        createdBy: true,
-        updatedBy: true,
-      },
-      data: { ...body, statusOrder: +(body.status === "INACTIVE"), updatedByUserId: req.user.sub },
-      where: { id: groupId },
+    const result = await prisma.$transaction(async (tx) => {
+      let code = "";
+      if (companyBefore && companyAfter && companyBefore !== companyAfter) {
+        const last = await tx.runningNo.upsert({
+          where: {
+            key: `PRODGRP_${companyAfter}`,
+          },
+          create: {
+            key: `PRODGRP_${companyAfter}`,
+            value: 1,
+          },
+          update: { value: { increment: 1 } },
+        });
+        code = `G${last.value.toString().padStart(2, "0")}`;
+      }
+      return await prisma.productGroup.update({
+        include: {
+          createdBy: true,
+          updatedBy: true,
+        },
+        data: {
+          ...body,
+          code: !!code ? code : undefined,
+          statusOrder: +(body.status === "INACTIVE"),
+          updatedByUserId: req.user.sub,
+        },
+        where: { id: groupId },
+      });
     });
 
     return result;