NBT is not Updating URLs in serialized data

Hello.

I have a plugin that stores data (Links, image urls, text, etc) in the postmeta table. This data is serialized.

When using this site as a template, when I create a new site the URLs will not be updated. You can see an example here:

http://comoaprenderacantar.org/test/template/
http://comoaprenderacantar.org/test/copy1/

How could this be solved?