Sales shipment header No 1120 47 already exist

Please how do i resolve this error message?

Welcome to DUG!!!

Which version of Navision you are using?

When you are getting this error ?

Thank you.

When raising sales order, we encounter an error message showing “ Sales shipment header No 1120 47 already exist”.

Its on version 4.0.

You need to check in sales header table diectly and remove the value from shipment field