fix: refs #7760 collection_assing

db/routines/vn/procedures/collection_assign.sql

@@ -118,9 +118,19 @@ BEGIN
 	IF vCollectionFk IS NULL THEN
 		CALL collection_new(vUserFk, vCollectionFk);
 
+		START TRANSACTION;
+
+		SELECT workerFk INTO vCollectionWorker
+			FROM `collection` 
+			WHERE id = vCollectionFk FOR UPDATE;
+
+		IF vCollectionWorker IS NULL THEN
 			UPDATE `collection`
 				SET workerFk = vUserFk
 				WHERE id = vCollectionFk;
 		END IF;
+
+		COMMIT;
+	END IF;
 END$$
 DELIMITER ;