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 ('cb9db1788877062433a24a30d74cf56b', -1, 1747813021, 1747813021, '0394f2ca', -2, 0, 0)

Line : 189
File : sessions.php