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 ('6987dbcd2a99ea9a52886475dc7b50e7', -1, 1560789568, 1560789568, '36912d8f', -7, 0, 0)

Line : 189
File : sessions.php