ALTER TABLE acm_container CHANGE cm_container_folder_created cm_container_created TIMESTAMP default CURRENT_TIMESTAMP; ALTER TABLE acm_container CHANGE cm_container_folder_modified cm_container_modified TIMESTAMP default CURRENT_TIMESTAMP; cm_class_name is null ALTER TABLE acm_file MODIFY COLUMN cm_file_name VARCHAR(1024) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NOT NULL;