How to migrate the SP 2013 workflows from one Scope to new Scope in SharePoint Server 2016

I have a SharePoint farm with Dedicated WFM farm which is working fine, Now i am splitting SharePoint farm in to two farms (Farm A and Farm B) but workflow manager farm will be remain same. Everything is working fine after the split expect SharePoint 2013 workflows. I am getting the Scope not found error when i try to run the workflows in farm B (it is expected that scope of the WFM change in farm B).

getInstances threw exception: Microsoft.Workflow.Client.ScopeNotFoundException: Scope '/SharePoint/default/ad2f730d-7d0c-417d-972f-df9a2d992506/c352cde2-28b2-4b54-a7ee-3ad215a6b726' was not found. HTTP headers received from the server - ActivityId: dsdd9142-62af-4df0-ad2b-297f6713e70. NodeId: KFWFM. Scope: /SharePoint/default/0d-7d0c-417d-972f-df9a2d992506/cde2-28b2-4b54-a7ee-3ad215a6b726. Client ActivityId : aebf9e-b173-a0e9-9225-ccda760a9ba5. ---> System.Net.WebException: The remote server returned an error: (404) Not Found. at Microsoft.Workflow.Common.AsyncResult.End[TAsyncResult](IAsyncResult result) at Microsoft.Workflow.Client.HttpGetResponseAsyncResult`1.End(IAsyncResult result) at Microsoft.Workflow.Client.ClientHelpers.SendRequest[T](HttpWebRequest r... 64aebf9e-b173-a0e9-9225-ccda760a9ba5

Now question, what is process to move the workflows related to these sites to under new scope.