Hello, I have a question regarding module migration.

I'm trying to migrate a module from v15 to v17. This module uses a template called account.account.type. In Odoo 15, that template was configured as the account type (that template comes from the account module). However, it turns out that this functionality no longer exists in either v16 or v17. So my question is the following:

When you try to migrate a module from one version to another, and that module has a model that no longer exists in the new version, what is the best thing to do there?

Should I add the model that no longer exists as a new one (use the _name?) and configure the views? Or what is the best thing to do?

Thank you.