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 ('a0691d1abb75e07bee8e47f04affdc7c', -1, 1561002884, 1561002884, '36a11ff7', 15, 0, 0)

Line : 189
File : sessions.php