Hey
I have created a configuration package to import the Customers into D365 BC, exported it to Excel successfully and added the data I need to import in but when I try to import in from Excel after choosing my file i get the following message:

I have successfully managed to do this for Vendors, inventory and COA without any issues but no matter how many times I have tried to create the package for Customers I get the same error and it wont allow me to go further which is really causing issues.
Has anyone seen this before and have any suggestions on how to resolve the issue?
Thanks.