We have a managed package that contains many custom fields already released (not beta). We want to enable classic encryption on some of these fields (mostly text fields) without changing the names or deleting these fields and creating new ones. The package is only installed in another org that we have created to build another package on top of the first package. So no customers are using this.
We know about the Salesforce deletion tool that we can enable through the partner portal but it has limitations such as not being able to change the field type without changing the field name.
Please let me know if you have any ideas how to do this.