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 ('5f00ab6992a1d048c0608c35da30150a', -1, 1713497958, 1713497958, '03915dd2', -4, 0, 0)

Line : 187
File : sessions.php