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 ('86f670ca9db80f48778126ccdffda27b', -1, 1566504950, 1566504950, '12e8ab12', 18, 0, 0)

Line : 189
File : sessions.php