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 ('4fc49e811bdd3ac22f598240d8d6ead1', -1, 1711725114, 1711725114, '12ce4ca0', -10, 0, 0)

Line : 187
File : sessions.php