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 ('8bc1fe6d8b43a8636d917e19cada25dd', -1, 1714009328, 1714009328, '0d3ac51a', -7, 0, 0)

Line : 187
File : sessions.php