Hi,
I've linked my Power BI model to an excel workbook, but when I try to refresh the data, I get the error "Item '[Column_Name]' already exists in the collection." However, my understanding is that, in order to update, column names had to be consistent between the model's existing dataset and new dataset.
I know this is probably an operator error, but I couldn't find any previous posts on it, so I could really use a hand.