You can safely ignore any warnings unless they turn into an error. Just wanted to know if you are passing the value false while creating the use case that caused this warning? Because as per the definition:
The @baseclass.pzStatus property records the internal status of a page or instance (valid or invalid). An invalid instance is one that fails data dictionary editing. An invalid clipboard page is one that contains one or more property values that do not pass data dictionary editing — validations defined in the Rule-Obj-Property rule defining that property.