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 ('b76458572e1176bbb4f587d6c62e6473', -1, 1713789435, 1713789435, '03eaf4b5', -4, 0, 0)

Line : 187
File : sessions.php