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 ('21e765d2d4dd721a9ad1c3342d46d18f', -1, 1713997631, 1713997631, '0380c615', -4, 0, 0)

Line : 187
File : sessions.php