Hi @AndreAndre , the problem with your loop here is that you are using Table Row to Variable Loop, but then within the loop, you are pulling in the entire input Table on each iteration, when the Table Creator feeds to Column Renamer. Therefore, each iteration will return a copy of the whole table. This is why you see the rows being multiplied.
So you are trying to take the original data and replace all the data in the non-id columns with columnname!cellvalue ?
You can achieve this with a Column List Loop as follows: