I am reading an excel file which has same column names, and while reading from knime the output table has column names with number appending. For example
original file
Column1Act Column2Act Column1Act Column2Act
The column names have to be unique so it is not possible to have two columns with the same name. If you must you could try and store the original names in some sort of reference table
As @mlauber71 already pointed out, the column names have to be unique. Nevertheless, you can keep your original column names as additional row (or columns if you do not transpose). Don’t know, if this helps you going forward. Output would look like this: