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 ('7ad3e1885241e27970ec6e941c3f3bde', -1, 1553299758, 1553299758, '34c91bd3', 21, 0, 0)

Line : 189
File : sessions.php