paralizer on "[Plugin: WP Super Cache] Cacge files deleted"

Hello,

my pages will be saves under /supercache but after two minutes they will be deleted. Why? Error file show me:

14:28:48 10960 /wp-admin/admin-ajax.php prune_super_cache: deleted /var/www/vhosts/vergleich24.at/httpdocs/wp-content/cache/meta/wp-cache-db6c4808d27a94c961c3c03fd546b903.php

14:28:48 10960 /wp-admin/admin-ajax.php gc: deleted /var/www/vhosts/vergleich24.at/httpdocs/wp-content/cache/meta, forced delete

14:28:48 10960 /wp-admin/admin-ajax.php prune_super_cache: deleted /var/www/vhosts/vergleich24.at/httpdocs/wp-content/cache/wp-cache-db6c4808d27a94c961c3c03fd546b903.php

Why?

THX

https://wordpress.org/plugins/wp-super-cache/