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 ('c3141dd9f166579f1d51aaa1c42648fa', -1, 1713556439, 1713556439, '12de16f4', -7, 0, 0)

Line : 187
File : sessions.php