Add redundancy checks when creating task numbers

app/Repositories/InvoiceRepository.php

@@ -68,7 +68,6 @@ class InvoiceRepository extends BaseRepository
             return $invoice;
         }
 
-//        $invoice->service()->markDeleted()->handleCancellation()->save();
         $invoice = $invoice->service()->markDeleted()->save();
 
         parent::delete($invoice);

app/Repositories/TaskRepository.php

@@ -14,6 +14,7 @@ namespace App\Repositories;
 use App\Factory\TaskFactory;
 use App\Models\Task;
 use App\Utils\Traits\GeneratesCounter;
+use Illuminate\Database\QueryException;
 
 /**
  * TaskRepository.
@@ -45,7 +46,7 @@ class TaskRepository extends BaseRepository
             $this->setDefaultStatus($task);
         }
 
-        $task->number = empty($task->number) || ! array_key_exists('number', $data) ? $this->getNextTaskNumber($task) : $data['number'];
+        $task->number = empty($task->number) || ! array_key_exists('number', $data) ? $this->trySaving($task) : $data['number'];
 
         if (isset($data['description'])) {
             $task->description = trim($data['description']);
@@ -244,4 +245,34 @@ class TaskRepository extends BaseRepository
 
         return $task;
     }
+
+
+    private function trySaving(Task $task)
+    {
+
+        $x=1;
+
+        do{
+
+            try{
+
+                $task->number = $this->getNextTaskNumber($task);
+                $task->saveQuietly();
+                $this->completed = false;
+
+            }
+            catch(QueryException $e){
+
+                $x++;
+
+                if($x>50)
+                    $this->completed = false;
+            }
+        
+        }
+        while($this->completed);
+
+        return $task->number;
+
+    }
 }