事件在mysql中无法正常工作

Question

当我重启MYSql服务器时，我创建了以下事件，用于向我的所有表添加外键约束，但是当我启动MYSql服务器时，它没有添加外键约束。

CREATE EVENT event1 

ON SCHEDULE EVERY 1 S

DO begin

alter table cele_details add constraint cele_details_ibfk_1 foreign key(cid) references cele_names(cid) on delete cascade on update cascade;

alter table movie_ratings add constraint movie_ratings_ibfk_1 foreign key(mid) references movies(mid) on delete cascade on update cascade;

alter table movie_details add constraint movie_details_ibfk_1 foreign key(mid) references movies(mid) on delete cascade on update cascade;

alter table music_details add constraint music_details_ibfk_1 foreign key(music_id) references music(music_id) on delete cascade on update cascade;

end   

我的活动有什么问题。