phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 2

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('802f5c73f9878fa0ec096e1d74221075', -1, 1550869298, 1550869298, '6b17b0a2', 19, 0, 0)

Line : 189
File : sessions.php