Is it possible to migrate issues without losing the Development info?

[Nicole_Brueckner]

Dear community, 

We are currently migrating one instance to a central instance (Data Center). Next to this they have Bitbucket Cloud in usage. 

Is there any chance to have the Development information migrated to the new instance? I know they are linked via issuekey, but if I would provide the old issuekey somehow in the new instance (Customfield "External ID")?

Thanks for helping out :) 

Best regards-, 

Nicole