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 ('93fb1525082baa34929919a1187ecf5d', -1, 1634919650, 1634919650, '23acd9ae', -2, 0, 0)

Line : 187
File : sessions.php