Microsoft is aware of this issue and is working on a change to remove this relationship after a delete then update.
Solution for Error code 80040203:
If you need to import the solution and can't recreate the solution package, then remove the relationship from the solution.
- Unzip the solution.
- Edit the customization.xml.
- Search for the relationship mentioned in the error: bpf_<entity>_<publisher>_<BPF Name>
- Delete all the XML for the EntityRelationship:
- Save the file.
- Zip the entire directory.
- Import the solution again.
Remove the relationship from the source and recreate your solution:
- Open the source organization.
- Select Settings / Customizations / Customize the System
- Select the Entity in the relationship:
- Expand 1:N Relationships.
- Locate the relationship:
- Select and delete the relationship.
- Publish All Customizations.
- Export the solution and import it into the target.
Hope this helps,
Regards,
Jimmywick
