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 ('e563068e3748c393dbe7908f900fe1a5', -1, 1711726023, 1711726023, '035b0b1e', -8, 0, 0)

Line : 187
File : sessions.php