Hi Ganesh,

the workflow status column of your list is normally configured to be read only. So you would have to change this property first. It is also a choice field that only accepts a predefined set of values. If you use the SharePoint Manager you can have a deeper look into this field.

I recommend you leave this field as it is and create your own field to store these information. If you don't want to show this workflow status column (e. g. because it shows useless/wrong information) just remove it from the view.

Regards

Philipp