phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('9faa0f5b2f1fd67576bdf6ca8db5f50b', -1, 1715111788, 1715111788, '340e9637', -8, 0, 0)

Line : 189
File : sessions.php