If you do want to have the new object(s) under version control and are importing many objects, you may want to click No to ...

If you do want to have the new object(s) under version control and are importing many objects, you may want to click No to abort the operation, restart Microsoft Dynamics 365 for Finance and Operations with the command-line parameter, ‘-silentidrequest=1', which effectively disables this dialog box, and repeat your import operation. Remember to remove the command-line parameter again.