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) VALUES ('a8f683bee5aa82af5c48bf5eed9e5d49', -1, 1715930478, 1715930478, '12778d2a', 15, 0)

Line : 158
File : sessions.php