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 ('1bf18fca1a5fa23b66d24e746bec4862', -1, 1713404892, 1713404892, '12740f1f', -2, 0, 0)

Line : 187
File : sessions.php