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 ('f4591fbbe1620e5ce2d7aca6c4e1ed4c', -1, 1713990158, 1713990158, '03131f49', -10, 0, 0)

Line : 187
File : sessions.php