diff --git a/src/controllers/PositionController.ts b/src/controllers/PositionController.ts
index b09d4184..9a8b782e 100644
--- a/src/controllers/PositionController.ts
+++ b/src/controllers/PositionController.ts
@@ -1497,7 +1497,10 @@ export class PositionController extends Controller {
           posMaster.orgChild4Id = org.id;
           posMaster.orgRevisionId = org.orgRevisionId;
         }
-      }
+      }  
+      const allPosMasterNo = posMasters.map(posMaster => posMaster.posMasterNo);
+      const maxPosMasterNo = Math.max(...allPosMasterNo);
+      posMaster.posMasterNo = maxPosMasterNo + 1;
       posMaster.createdUserId = request.user.sub;
       posMaster.createdFullName = request.user.name;
       posMaster.lastUpdateUserId = request.user.sub;