Unclear message under „trusted apps“

Hi there,

I am hunting a strange issue in my local network. I stumbled over the following message under “trusted apps” in eBlocker:

“System updates have not been applied to some exception lists due to custom modifications. Please reset those exception lists to get the latest updates. You may make a copy of your changes to apply them again if required.”

I do not exactly understand what that means. Does it mean I shall remove all the manual entries to the trusted app list? If so, how do I backup and restore them automatically? What is meant by system updates?

Thanks!