alter table `event` rename to `event_backup_5784568`;

create table `event`
(
    `id`          integer primary key autoincrement,
    `project_id`  int,
    `object_id`   int,
    `object_type` varchar(20) DEFAULT '',
    `description` text,
    `created`     datetime NOT NULL,
    `user_id`     int,
    foreign key (`project_id`) references `project` (`id`) on delete cascade,
    foreign key (`user_id`) references `user` (`id`) on delete set null
);