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 ('9f083c7763e5e0d60a62a1442bf1f4a9', -1, 1553303381, 1553303381, '34c91bd3', 21, 0, 0)

Line : 189
File : sessions.php