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 ('96db0e4bfd50c44c7c2c3cf4b08887ad', -1, 1566699246, 1566699246, '03511c5e', 0, 0, 0)

Line : 189
File : sessions.php