Upgrading Customized C/AL Application to Microsoft Base Application Version 19

weneed

I'm trying to upgrade from BC14 to BC19 following the directions in the Microsoft document.
At task 11 step 4 (Synchronize the empty versions of system application, base application, and customization extensions that you published in Task 8) receive an error:



I am sure I have performed the indicated steps correctly. What could be the problem?

weneed

I think I understand the problem. In the BC14 (C/AL) version I have standard tables with some custom fields that I have not moved to the extension created for BC19. Is there a way to delete fields during sync without having to do it manually first?