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 ('a7c09b251a7f5314d79404091e655355', -1, 1563573255, 1563573255, '12d16807', -6, 0, 0)

Line : 189
File : sessions.php