In this blog we assume that you are already familiar with creating set types and attributes but that you run into issues when you want to remove or change an existing set type.
For those who are not familiar with set types and attributes a short introduction:
Set types and attributes can be maintained via the transaction COMM_ATTRSET in CRM.
First you create your attributes which are then grouped in a set type. The set type is then assigned to a product category via transaction COMM_HIERARCHY and the attributes become available in your product master.