ошибка mysql Cant create table '...' (errno: 121)

CREATE TABLE likes_users (
id int(11) NOT NULL AUTO_INCREMENT,
uid int(11) NOT NULL,
tid int(11) NOT NULL,
type int(11) NOT NULL,
PRIMARY KEY (id),
INDEX uid (uid),
CONSTRAINT likes_users_ibfk_1 FOREIGN KEY (uid)
REFERENCES lily_user (uid) ON DELETE RESTRICT ON UPDATE RESTRICT
)