diff --git a/src/controllers/04-institution-controller.ts b/src/controllers/04-institution-controller.ts
index ab1275b..3747600 100644
--- a/src/controllers/04-institution-controller.ts
+++ b/src/controllers/04-institution-controller.ts
@@ -16,7 +16,7 @@ import {
   Tags,
 } from "tsoa";
 import prisma from "../db";
-import { notFoundError } from "../utils/error";
+import { isUsedError, notFoundError } from "../utils/error";
 import { queryOrNot } from "../utils/relation";
 import { RequestWithUser } from "../interfaces/user";
 import { deleteFile, fileLocation, getFile, getPresigned, listFile, setFile } from "../utils/minio";
@@ -155,9 +155,15 @@ export class InstitutionController extends Controller {
     return await prisma.$transaction(async (tx) => {
       const record = await tx.institution.findFirst({
         where: { id: institutionId },
+        include: {
+          taskOrder: {
+            take: 1,
+          },
+        },
       });
 
       if (!record) throw notFoundError("Institution");
+      if (record.taskOrder.length > 0) throw isUsedError("Institution");
 
       return await tx.institution.delete({
         where: { id: institutionId },