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 ('a9b6a1b1b339b821a6471268391074f0', -1, 1713923983, 1713923983, '1276b8ed', 2, 0, 0)

Line : 187
File : sessions.php