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 ('6d4a9689961991e02b31d1ef5320a4b0', -1, 1713480775, 1713480775, '03859a6a', 0, 0, 0)

Line : 187
File : sessions.php