I added some validations

workflow/engine/classes/class.wsTools.php

@@ -640,11 +640,13 @@ class workspaceTools
 
             while ($rs_query->next()) {
                 $row_query = $rs_query->getRow();
+                if($row_query['TIME']>0){
                    $oStatement_query = $connection->prepareStatement( "kill ". $row_query['ID'] );
                    $oStatement_query->executeQuery();
                 }
             }
         }
+    }
 
     /**
      * fix the 32K issue, by migrating /files directory structure to an uid tree structure based.