phpBB : Critical Error

Error creating new session

DEBUG MODE

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

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in) VALUES ('1214c42a2252dc7e542918b190e8bb6b', -1, 1714618420, 1714618420, '1275c4d9', 20, 0)

Line : 158
File : sessions.php