phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO forum_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('13cf645f9f8d29cea69729ee269647f1', -1, 1539932709, 1539932709, '36a6cfdf', 6, 0, 0)

Line : 187
File : sessions.php