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 ('488406924a40ec016fa31c38032ab97b', -1, 1534245459, 1534245459, '36e137ae', 0, 0, 0)

Line : 189
File : sessions.php