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 ('3af7dffb895b99f958e19ac6367c383b', -1, 1713951730, 1713951730, '0390549b', -4, 0, 0)

Line : 187
File : sessions.php