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 ('cbdda5fc13ab491ca73fb3e26ab4dca5', -1, 1614925885, 1614925885, '03ee07ca', -4556, 0, 0)

Line : 189
File : sessions.php