I have a Linked Table being Updated from Dropbox every day. When the Table was set up there was a key established that is not always a unique value. Recently we have run into problems because there are duplicates in this key field and the file will not import. We can correct this problem by changing the key to a different field, but it is not feasible to re-establish all relationships and formulas based on the old key field. Is there any way to change the key field but keep all previous data and functionality?