When doing changes to the schema namespaces and reconfigure JAXB binding using both just refresh or even delete and recreate the editor is still showing me classes from already not existing package. 

For example I have namespace "A" and one element <myElement>, when I change the namespace in XSD to B, remove jaxb binding and recreate it or just refresh ( I also tried delete the build and xml-resources folders), and regererate jaxb classes.

then when I go to my Java application, delete all imports there is missing import for MyElement class comming from JAXB, when I click on proposed classes to import, it is showing me both:
A.MyElement - this is not fine as soon as this package doesn't exists
B.MyElement - this is fine

I didn't searched for the text of the full package name, it is clear to me, that it is referenced from some filesystem storage, I deleted the cache folder but still the same.

Anyway Netbeans knows that it doesn't exists somehow, because the will of course fail when run, but when I manually write the import declaration it is giving me the choice to use package which doesn't exists.