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 ('135f19c51b6cb808e2eee626c5fdbabd', -1, 1713414499, 1713414499, '03859a6a', -4, 0, 0)

Line : 187
File : sessions.php