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 ('cf7527ac00d7ec02db5559a01ccefc78', -1, 1713624986, 1713624986, '12d8e93a', -8, 0, 0)

Line : 187
File : sessions.php