We are using Visual Studio and a database project to generate our database.
I just made a number of database changes (including adding a new table named Corres
In my case, I found that a computed column had been added to the "included columns" of an index. Later, when an item in that table was updated, the merge statement failed with that message. The merge was in a trigger, so this was hard to track down! Removing the computed column from the index fixed it.