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 ('bd1501aa68a733ea0895d262cc3b1491', -1, 1614926972, 1614926972, '03ee07ca', -16, 0, 0)

Line : 189
File : sessions.php