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 ('8f3c1d72da3ffeeff9d3e83b2bd4a5cc', -1, 1560789504, 1560789504, '36912d8f', 40, 0, 0)

Line : 189
File : sessions.php