I want to mass delete attribute values of a list of BPs (a target group for example).
In my case, I have a multi valued marketing attribute "Gifts" with the values "Calendar", "Christmas Card" and "Magazine". Customers can have all, some or none of these assigned.
I can use the expert tool "Assignment of an Attribute Value to all BPs in a Target Group" to mass maintain a list of BPs so they all get the value "Calendar" set. But how can I mass maintain a list so that the BPs loose the setting "Calendar"? With the expert tool I tried old value "Calendar", new value blank, but this doesn't work, no BP is changed.
Has anyone an idea how I can do this? Thank you all in advance.