diff --git a/module/execution/model.php b/module/execution/model.php
index 91023c612d..b5748b101e 100755
--- a/module/execution/model.php
+++ b/module/execution/model.php
@@ -593,7 +593,7 @@ class executionModel extends model
         }
 
         $relatedExecutionsID = $this->getRelatedExecutions($executionID);
-        $relatedExecutionsID = !empty($relatedExecutionsID) ? implode("','", array_keys($relatedExecutionsID)) : '';
+        $relatedExecutionsID = !empty($relatedExecutionsID) ? implode(',', array_keys($relatedExecutionsID)) : '';
 
         /* Update data. */
         $this->lang->error->unique = $this->lang->error->repeat;
@@ -604,7 +604,7 @@ class executionModel extends model
             ->checkIF($execution->begin != '', 'begin', 'date')
             ->checkIF($execution->end != '', 'end', 'date')
             ->checkIF($execution->end != '', 'end', 'ge', $execution->begin)
-            ->checkIF(!empty($execution->name), 'name', 'unique', "id in ('$relatedExecutionsID') and type in ('sprint','stage', 'kanban') and `project` = '$executionProject' and `deleted` = '0'")
+            ->checkIF(!empty($execution->name), 'name', 'unique', "id in ($relatedExecutionsID) and type in ('sprint','stage', 'kanban') and `project` = '$executionProject' and `deleted` = '0'")
             ->checkIF(!empty($execution->code), 'code', 'unique', "id != $executionID and type in ('sprint','stage', 'kanban') and `deleted` = '0'")
             ->checkFlow()
             ->where('id')->eq($executionID)