Error: An error occurred before executing the process 'Import Selection Business Process' : Error importing the selection: Violation of PRIMARY KEY constraint 'PK_IMPORTSELECTION_STATICIDSET_GUID'. Cannot insert duplicate key in object 'dbo.IMPORTSELECT
Users have the ability to create import selections based on different field types such as Alternative Lookupid. It's possible for constituents to have multiple alternative lookupids of the same type and for these to end up in the same file being used for the import selection. Users are finding that they receive an error when there are multiple lookupids for the same constituent resulting in a duplicate constituent entry throwing the above error. This error doesn't help front end users identify what records are causing duplicate entries.
We are currently evaluating this issue and will update this article when we have more information.