Hi @a.alonsosalas,
If you are using a pre-2017 version you can delete the autogen properties from the project *PnIdPart.xml:
How-to-delete-project-autogeneration-properties
If you are using 2017 you need to delete it from the ProcessPower.dcf file.
To delete it from the projects DCF file you need to use an SQLite editot (I use SQLite Expert but there are many other options).
I would strongly recommend backing up the project before manually editing the database DCF files.

It should be noted that hacking the database DCF file like this is not officially supported and done at your own risk.
Thanks,
Dan

Dan Scales