Cancelled invoice not transfered to accountding due to Forign trade data is

HI,

We have problem with Cancelled invoice number.

Scenerio is like below.

We have already created the invoice number from the Delivery ( consignmnet Delivery)

User by mistake cancelled the invoice and also cancelled the respective Delivey number.

Now the issue is in cancelled invoice missing data is showing as error 'Missing export data' due to this this information is not posted to accounting.

Now user can not able to open the cancelled invoice in change mode this is due reference Delivery is already cancelled.

Please suggest me how to resolve this issue.

Thanks & Regards,

MK.