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 ('a5b8c3748cda88ca19dd5e6a234594a4', -1, 1713422593, 1713422593, '12bf84fa', 0, 0, 0)

Line : 187
File : sessions.php