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 ('da7f69136d47f63b5d77ae654a35c848', -1, 1711695212, 1711695212, '2cdf2589', -4, 0, 0)

Line : 187
File : sessions.php