Validation Error: Only one Primary phone per type is allowed, when importing new Primary phone numbers in the Raiser's Edge when there is an existing Primary Phone number with that Phone Type. Unable to Add new primary phone number through import when an existing phone number exists with the same phone type
We are currently evaluating this issue and will update this article when we have more information.
Remove primary flag option from the import
Import new/update existing phones but create an output query in the import