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 ('43df9e61c6ab322feb18d4726a62dba8', -1, 1748127115, 1748127115, '340f5b97', -10, 0, 0)

Line : 189
File : sessions.php