fixed sql to remove Pracownik from group

tools/Bocian.php

@@ -1379,7 +1379,10 @@ public function showPowiazaniaEnergaRumKontrahenciPowiazania($items) {
 				'default_db__x3A__BI_audit_ENERGA_PRACOWNICY:BI_audit_ENERGA_PRACOWNICY');
 			foreach ($pracownicyIds as $pracownikIds) {
 				$id = (int)$pracownikIds;
-				DB::getPDO()->execSql("delete from {$refGrupyToPracownicy} where PRIMARY_KEY= {$idGroup} and  REMOTE_PRIMARY_KEY = {$id}");
+				DB::getPDO()->execSql(" delete from `{$refGrupyToPracownicy}` where PRIMARY_KEY = :pk and  REMOTE_PRIMARY_KEY = :remote_pk ", [
+					':pk' => $idGroup,
+					':remote_pk' => $id
+				]);
 			}
 
 			return [