diff --git a/app/Http/Controllers/VersionGanttController.php b/app/Http/Controllers/VersionGanttController.php
index c3fe398..c5fabab 100644
--- a/app/Http/Controllers/VersionGanttController.php
+++ b/app/Http/Controllers/VersionGanttController.php
@@ -2,8 +2,15 @@
 
 namespace App\Http\Controllers;
 
-use Illuminate\Http\Request;
+use App\Models\Link;
+use App\Models\Holiday;
+use App\Models\Activity;
 use App\Models\VersionGantt;
+use Illuminate\Http\Request;
+use App\Models\ShowHideColumn;
+use App\Models\UserToActivity;
+use App\Models\UserToVersionGantt;
+use App\Models\ActivityProgressLog;
 
 class VersionGanttController extends Controller
 {
@@ -49,6 +56,7 @@ class VersionGanttController extends Controller
 
         if($data){
             $delete = $data->delete();
+            $this->deleteRelative($data['id']);
         }else{
             return response()->json(['status'=>'failed','message'=>'data version gantt Project not found!','code'=>400], 400);
             die();
@@ -62,6 +70,17 @@ class VersionGanttController extends Controller
         }
     }
 
+    private function deleteRelative($version_gantt_id)
+    {
+        UserToActivity::where('version_gantt_id', $version_gantt_id)->delete();
+        Activity::where('version_gantt_id', $version_gantt_id)->delete();
+        ShowHideColumn::where('version_gantt_id', $version_gantt_id)->delete();
+        Link::where('version_gantt_id', $version_gantt_id)->delete();
+        UserToVersionGantt::where('version_gantt_id', $version_gantt_id)->delete();
+        Holiday::where('version_gantt_id', $version_gantt_id)->delete();
+        ActivityProgressLog::where('version_gantt_id', $version_gantt_id)->delete();
+    }
+
     public function edit($id){
         if(!$id || (int) $id < 0 || $id==""){
             return response()->json(['status'=>'failed','message'=>'id is required!','code'=>400], 400);