diff --git a/src/components/Project/Infrastructure/TaskModel.jsx b/src/components/Project/Infrastructure/TaskModel.jsx
index 087a731e..fa142fa2 100644
--- a/src/components/Project/Infrastructure/TaskModel.jsx
+++ b/src/components/Project/Infrastructure/TaskModel.jsx
@@ -86,7 +86,7 @@ const TaskModel = ({
       ...prev,
       floorId: value,
       workAreaId: 0,
-      activityID: 0,
+      activityID: "",
       workCategoryId: categoryData?.[0]?.id?.toString() ?? "",
     }));
   };
@@ -291,7 +291,7 @@ const TaskModel = ({
                     {...register("activityID")}
                     onChange={handleActivityChange}
                   >
-                    <option value="0">Select Activity</option>
+                    <option value="">Select Activity</option>
                     {activityData &&
                       activityData.length > 0 &&
                       activityData