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 ('a86c960c83d5c1e8351dcc9cd96e13b2', -1, 1560771734, 1560771734, '035acf59', -4, 0, 0)

Line : 189
File : sessions.php