Что не так с моей командой (MySQL)

ALTER TABLE project_list
    -> CHANGE COLUMN number proj_id INT NOT NULL AUTO_INCREMENT,
    -> ADD PRIMARY KEY ('proj_id');

Ошибка

ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ''proj_id')' at line 3