The copies act like completely new data elements. They should have different names like "DataElementName (Copy)". If you don't need these extra data elements anymore, you must ensure that they are not included in any libraries (check the 'Publishing' section) before you can actually delete the item.There are a few other feature ideas posted here that may help users identify where data elements are used when they are trying to delete them.Like this one: Simplify the flow for deleting rules/data e...