diff --git a/src/controllers/EmployeePositionController.ts b/src/controllers/EmployeePositionController.ts
index e4cec3e6..e9d035bf 100644
--- a/src/controllers/EmployeePositionController.ts
+++ b/src/controllers/EmployeePositionController.ts
@@ -700,8 +700,8 @@ export class EmployeePositionController extends Controller {
     // posMaster.isStaff = requestBody.isStaff == null?_null:requestBody.isStaff;
     // posMaster.positionSign = requestBody.positionSign == null ? _null : requestBody.positionSign;
     // posMaster.isOfficer = requestBody.isOfficer;
-    posMaster.posMasterNoPrefix = requestBody.posMasterNoPrefix;
-    posMaster.posMasterNoSuffix = requestBody.posMasterNoSuffix;
+    posMaster.posMasterNoPrefix = requestBody.posMasterNoPrefix ?? _null;
+    posMaster.posMasterNoSuffix = requestBody.posMasterNoSuffix ?? _null;
     posMaster.reason = requestBody.reason == null ? "" : requestBody.reason;
     posMaster.orgRootId = null;
     posMaster.orgChild1Id = null;
diff --git a/src/controllers/PositionController.ts b/src/controllers/PositionController.ts
index d7ad85fe..d608bbbc 100644
--- a/src/controllers/PositionController.ts
+++ b/src/controllers/PositionController.ts
@@ -1250,8 +1250,8 @@ export class PositionController extends Controller {
         ? _null
         : requestBody.positionSign;
     posMaster.posMasterNo = requestBody.posMasterNo;
-    posMaster.posMasterNoPrefix = requestBody.posMasterNoPrefix;
-    posMaster.posMasterNoSuffix = requestBody.posMasterNoSuffix;
+    posMaster.posMasterNoPrefix = requestBody.posMasterNoPrefix ?? _null;
+    posMaster.posMasterNoSuffix = requestBody.posMasterNoSuffix ?? _null;
     posMaster.reason = requestBody.reason == null ? "" : requestBody.reason;
 
     let orgRoot: any = null;
diff --git a/src/entities/EmployeePosMaster.ts b/src/entities/EmployeePosMaster.ts
index ed79835f..c1f0e143 100644
--- a/src/entities/EmployeePosMaster.ts
+++ b/src/entities/EmployeePosMaster.ts
@@ -235,13 +235,13 @@ export class EmployeePosMaster extends EntityBase {
 
 export class CreateEmployeePosMaster {
   @Column()
-  posMasterNoPrefix: string;
+  posMasterNoPrefix: string | null;
 
   @Column()
   posMasterNo: number;
 
   @Column()
-  posMasterNoSuffix: string;
+  posMasterNoSuffix: string | null;
 
   @Column("uuid")
   positions: CreateEmployeePosDict[];
diff --git a/src/entities/PosMaster.ts b/src/entities/PosMaster.ts
index 938067e9..59018baa 100644
--- a/src/entities/PosMaster.ts
+++ b/src/entities/PosMaster.ts
@@ -267,13 +267,13 @@ export class PosMaster extends EntityBase {
 
 export class CreatePosMaster {
   @Column()
-  posMasterNoPrefix: string;
+  posMasterNoPrefix: string | null;
 
   @Column()
   posMasterNo: number;
 
   @Column()
-  posMasterNoSuffix: string;
+  posMasterNoSuffix: string | null;
 
   @Column("uuid")
   positions: CreatePosDict[];