Data Table Bug

I am passing a datatable to a workflow (As IN Argument) and changing the value of first cell inside the workflow , but when come out of the workflow and print the value of the first cell it is the changed value. This issue is not just limited to Assign. Please explain.

eg. Table1 has three rows, and in the workflow1 i will change the first cell from ‘Priyanka’ to ‘Pariniti’ and when i come out of workflow1 it should print ‘Priyanka’ as I passed Table1 as IN Argument to workflow1 but it is printing ‘Pariniti’.

@PriPri
Do a crosscheck if the arguments are correct handled (in, out, in/out directions)

I am Passing them as Input arguments only.