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 ('bab0016b1c8530fe34615b85ce36d9f7', -1, 1713838686, 1713838686, '03e3f048', -8, 0, 0)

Line : 187
File : sessions.php