I have upgrading my silverstripe website from 2.x to 4.1. Now i run into the problem that the pagetypes in the CMS do no exist anymore because of introducing NameSpaces and therefore i have to resave all the pages in the CMS. After this the pages work fine again and the data is there.
The .upgrade.yml provides a mapping between the old class and the new namespaced class, so i would i assume this takes care of that problem. But i cannot find/see the use case of this .upgrade.yml file as these mappings clearly do not work.
Does anybody have a solution for this? or could point me to the documentation that i missed? i followed the official upgrade documentation and used the CLI to do the namespacing.
Thanks in advance