The column name '%1!s!' is specified more than once in the SET clause or column list of an INSERT. A column cannot be assigned ...

The column name '%1!s!' is specified more than once in the SET clause or column list of an INSERT. A column cannot be assigned more than one value in the same clause. Modify the clause to make sure that a column is updated only once.  If this statement updates or inserts columns into a view, column aliasing can conceal the duplication in your code.