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 ('0807f7e27e9a4cb6e9fb12fcc2f221bd', -1, 1713500592, 1713500592, '12bdc1ac', -7, 0, 0)

Line : 187
File : sessions.php