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 ('66ed11de5e63be8bb2e0aaa7f7b1d41d', -1, 1713909647, 1713909647, '03859fe0', -4, 0, 0)

Line : 187
File : sessions.php