2575790 - Error "Instance with the same key (XYZ..) already exists" While Importing Marketing Attributes in Data Workbench

You are importing Business Attribute Assignments (Marketing Attributes) to Accounts using Data Workbench using the same External Key assignment to different Business Partners in your files and you want to know why the import works for some Business Partners and not for others, some resulting in the error message:

"Instance with the same key (XYZ..) already exists" (XYZ represents the unique identifier ID from the Business Attribute instance in backend)

SAP Hybris Cloud for Customer 1711 and higher.

data, workbench, businessattributeassignment, marketing, attributes, import, instance, already, exists, account, business, partner , KBA , LOD-CRM-INT-DWB , Data Workbench , Problem