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 ('7903c49e94fbe4ff926aca3ddfef7eba', -1, 1714296744, 1714296744, '0a020003', -8, 0, 0)

Line : 187
File : sessions.php