phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '84f52cc810b9823f40bca3c2cc40dcf1' for key 'phpbb_sessions.PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('84f52cc810b9823f40bca3c2cc40dcf1', -1, 1770337896, 1770337896, 'd849d868', 14, 0, 0)

Line : 187
File : sessions.php