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 ('8f40e1dd6d74f448486fc6f6e57b0c54', -1, 1713510316, 1713510316, '12de6f18', -8, 0, 0)

Line : 187
File : sessions.php