fix 开业营运方案筹备人为null

coolstore-partner-model/src/main/java/com/cool/store/request/OpeningOperationPlanRequest.java

@@ -56,6 +56,8 @@ public class OpeningOperationPlanRequest {
             } else if (this.preparationUserIds.isEmpty()) {
                 openingOperationPlanDO.setPreparationUserIds("");
             }
+        }else{
+            openingOperationPlanDO.setPreparationUserIds("");
         }
         openingOperationPlanDO.setActivityTheme(this.activityTheme);
         openingOperationPlanDO.setRouteCompleted(this.routeCompleted);