Piwigo encountered a non recoverable error

[mysql error 1049] Unknown database 'muzachan_piwigo'
Connection to server succeed, but it was impossible to connect to database

#1	my_error /srv/www/muza-chan.net/public_html/photo/include/common.inc.php(129)
#2	include_once /srv/www/muza-chan.net/public_html/photo/random.php(29)