Variant configuration issue

Hi SAP Guru's,

We have variant configured at the client place. My requirement is related to copying from Sales order ZOR to Sales order ZTA document.

When I copy from ZOR to ZTA , variant configuration characteristics and values get copied to ZTA. These characteristics are in Display mode, ie I cannot edit / Change these values.

Here business wants these Characteristics to be editable in ZTA Sales order document.

How do I achieve this requirement?

Please advise.

Thanks

Nidhish.