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, session_admin) VALUES ('990f11a989a296fd2b25edf0cce4e9d2', -1, 1711658878, 1711658878, '2cdf1f94', -2, 0, 0)

Line : 187
File : sessions.php