phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '797721fa32fb57bb1d63caa54ea6b256' for key 'PRIMARY'

INSERT INTO sub_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('797721fa32fb57bb1d63caa54ea6b256', -1, 1771909080, 1771909080, 'd849d878', -4, 0, 0)

Line : 187
File : sessions.php