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 ('e7a2ce5c95b3fdf87b8251c604c87faf', -1, 1713993666, 1713993666, '12e296af', -4, 0, 0)

Line : 187
File : sessions.php