Zend certified PHP/Magento developer

Magento 2.4.4 suddenly adds cache tag to env.php

All of a sudden a cache tag was added to my env.php which made made my Magento 2.4.4 crash.

enter image description here

I cannot run cache flush or anything without getting the following error:
Notice: Undefined index: frontend in

/var/www/magento2/vendor/magento/framework/App/Cache/Frontend/Pool.php on line 90

When I remove the cache-tag, everything works are normal again.

How could this tag appear out of nowhere??
Is this a hack?