Hello, I have a question regarding the publication of packages, I want to make sets that will use a package I published earlier. To clarify, I will make a package of materials, textures and decals (base materials for future updates) which will be published for free, next packages will contain models that will require these previously published materials, is it possible?
yes, I think it may be a problem, thank you for the answer 
I don’t believe this is possible. You should make sure your package contains everything it needs.