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 ('84178fb59d4d2eb0616eb75fb593103c', -1, 1713895948, 1713895948, '0d3a524f', 4, 0, 0)

Line : 187
File : sessions.php