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 ('569d9efa834cc39a694f267c6b6eb775', -1, 1713947782, 1713947782, '340e7e4a', -4, 0, 0)

Line : 187
File : sessions.php