When I loaded my save after the latest 1.4.2 update I found that all buildings from the PyFusion tab were removed. Due to the already very large size of my base (almost at circuit 2) it would take an insane amount of work to craft and place the updated PyFusion buildings. Would it be possible for you to add a migration script to PyFusion?

Edit: The save game was loaded with PyCoalProcessing version 1.4.3 to avoid a bug at factorio start with version 1.4.4.

Thank you for your help!

I did add a migration script. Must not being working right.

Here is the factorio log including factorio startup and loading the savegame:
https://drive.google.com/file/d/1JwkSAhsWzYTWkjFoTCBBfvUx2JKjRcT3/view?usp=sharing

ok for reasons the migration file wasnt included in the uploaded files on the portal. got that fixed it should work now

Thank you very much for the quick help. Looks like it is working again.