we use Enterprise version and had experiences to lost some of custom device template threshold settings after ppm patch. (the custom templates do not impact)

does have known issue about settings lost during ppm patch?

also, how to avoid this issue during ppm patch through a backup?  The concern is I do not know original release version backup can be restored to a newer release version.

Or I should backup custom template individual and resotre it into a newer version?

Thank you.

Code Chang