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 ('83f1fe93ac29307a9683ad4d3a5d3564', -1, 1713575015, 1713575015, '03856dd3', -4, 0, 0)

Line : 187
File : sessions.php