diff --git a/src/controllers/branch-user-controller.ts b/src/controllers/branch-user-controller.ts
index 19ffcd9..d33b307 100644
--- a/src/controllers/branch-user-controller.ts
+++ b/src/controllers/branch-user-controller.ts
@@ -157,6 +157,12 @@ export class BranchUserController extends Controller {
     await prisma.$transaction(
       body.user.map((v) => prisma.branchUser.deleteMany({ where: { branchId, userId: v } })),
     );
+    await prisma.user.updateMany({
+      where: {
+        branch: { none: {} },
+      },
+      data: { code: null },
+    });
   }
 
   @Delete("{userId}")
@@ -164,6 +170,13 @@ export class BranchUserController extends Controller {
     await prisma.branchUser.deleteMany({
       where: { branchId, userId },
     });
+    await prisma.user.updateMany({
+      where: {
+        id: userId,
+        branch: { none: {} },
+      },
+      data: { code: null },
+    });
   }
 }
 
@@ -253,6 +266,12 @@ export class UserBranchController extends Controller {
     await prisma.$transaction(
       body.branch.map((v) => prisma.branchUser.deleteMany({ where: { userId, branchId: v } })),
     );
+    await prisma.user.updateMany({
+      where: {
+        branch: { none: {} },
+      },
+      data: { code: null },
+    });
   }
 
   @Delete("{branchId}")
@@ -260,5 +279,12 @@ export class UserBranchController extends Controller {
     await prisma.branchUser.deleteMany({
       where: { branchId, userId },
     });
+    await prisma.user.updateMany({
+      where: {
+        id: userId,
+        branch: { none: {} },
+      },
+      data: { code: null },
+    });
   }
 }