Unsupported column type '?' shows on Excel writer

I have a functionning workflow it worked well for one input excel file. when i tried with new input excel file with different data i got the below problem “Execute failed: Unsupported column type ‘?’. Please remove corresponding column(s) from the input table.”

I noticed that, for one input file at the output node all columns have string data type mentioned at the top but for another input file it has “?” instead of having a data type.

But both file has same kind of data

So is this a source of problem ?