phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '531bdf938967e54083b017b1761a1cb3' for key 'PRIMARY'

INSERT INTO forum_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('531bdf938967e54083b017b1761a1cb3', -1, 1770093527, 1770093527, 'd849d859', 9, 0, 0)

Line : 186
File : sessions.php