pending customer po grouped by customer

routes/web.php

@@ -75,7 +75,7 @@ Route::group(['middleware' => ['role:admin']], function() {
 
         $bookings = Booking::where('admin_status', 6)->where(function($q){
             $q->WhereDoesntHave('invoice')->WhereDoesntHave('purchaseOrder');
-        })->whereYear('created_at', 2020)->whereMonth('created_at', '>=', 4)->get();
+        })->whereYear('created_at', '>=', 2020)->whereMonth('created_at', '>=', 4)->get();
         $months = $bookings->groupBy(function($item) {
             return $item->created_at->format('Y-m');
         });