diff --git a/src/controllers/EmployeePositionController.ts b/src/controllers/EmployeePositionController.ts
index 7b6ccb33..a397a95f 100644
--- a/src/controllers/EmployeePositionController.ts
+++ b/src/controllers/EmployeePositionController.ts
@@ -613,7 +613,7 @@ export class EmployeePositionController extends Controller {
     posMaster.posMasterNo = requestBody.posMasterNo;
     posMaster.posMasterNoPrefix = requestBody.posMasterNoPrefix;
     posMaster.posMasterNoSuffix = requestBody.posMasterNoSuffix;
-    posMaster.reason = requestBody.reason;
+    posMaster.reason = requestBody.reason == null ? "" : requestBody.reason;
     posMaster.orgRootId = null;
     posMaster.orgChild1Id = null;
     posMaster.orgChild2Id = null;
diff --git a/src/controllers/PositionController.ts b/src/controllers/PositionController.ts
index aa5abbde..f53ed9d3 100644
--- a/src/controllers/PositionController.ts
+++ b/src/controllers/PositionController.ts
@@ -772,7 +772,7 @@ export class PositionController extends Controller {
     posMaster.posMasterNo = requestBody.posMasterNo;
     posMaster.posMasterNoPrefix = requestBody.posMasterNoPrefix;
     posMaster.posMasterNoSuffix = requestBody.posMasterNoSuffix;
-    posMaster.reason = requestBody.reason;
+    posMaster.reason = requestBody.reason == null ? "" : requestBody.reason;
     posMaster.orgRootId = null;
     posMaster.orgChild1Id = null;
     posMaster.orgChild2Id = null;
diff --git a/src/entities/EmployeePosMaster.ts b/src/entities/EmployeePosMaster.ts
index 8e7fe449..e4c0bf39 100644
--- a/src/entities/EmployeePosMaster.ts
+++ b/src/entities/EmployeePosMaster.ts
@@ -224,7 +224,7 @@ export class CreateEmployeePosMaster {
   orgChild4Id?: string | null;
 
   @Column()
-  reason: string;
+  reason: string | null;
 }
 
 export type UpdateEmployeePosMaster = Partial<EmployeePosMaster>;
diff --git a/src/entities/PosMaster.ts b/src/entities/PosMaster.ts
index 6f258455..ed24fb89 100644
--- a/src/entities/PosMaster.ts
+++ b/src/entities/PosMaster.ts
@@ -223,7 +223,7 @@ export class CreatePosMaster {
   orgChild4Id?: string | null;
 
   @Column()
-  reason: string;
+  reason: string | null;
 }
 
 export type UpdatePosMaster = Partial<PosMaster>;