diff --git a/src/controllers/03-customer-controller.ts b/src/controllers/03-customer-controller.ts
index e5ed73a..87e708a 100644
--- a/src/controllers/03-customer-controller.ts
+++ b/src/controllers/03-customer-controller.ts
@@ -418,9 +418,33 @@ export class CustomerController extends Controller {
 
     if (record.status !== Status.CREATED) throw isUsedError("Customer");
 
-    return await prisma.customer
-      .delete({ where: { id: customerId } })
-      .then((data) => deleteFolder(`customer/${customerId}`).then(() => data));
+    await prisma.$transaction(async (tx) => {
+      await deleteFolder(`customer/${customerId}`);
+      const data = await tx.customer.delete({
+        include: {
+          branch: true,
+          registeredBranch: {
+            include: {
+              headOffice: true,
+            },
+          },
+        },
+        where: { id: customerId },
+      });
+
+      await tx.runningNo.deleteMany({
+        where: {
+          key: {
+            in: data.branch.map(
+              (v) =>
+                `CUSTOMER_BRANCH_${(data.registeredBranch.headOffice || data.registeredBranch).code}_${v.code.slice(0, -3)}`,
+            ),
+          },
+        },
+      });
+
+      return await tx.customer.delete({ where: { id: customerId } });
+    });
   }
 }