You deploy in phases. You only remove data in the final phase. I wrote about this at https://engineering.edx.org/django-migration-donts-f4588fd11b64 https://eng

You deploy in phases. You only remove data in the final phase. I wrote about this at https://engineering.edx.org/django-migration-donts-f4588fd11b64 https://engineering.edx.org/django-migration-donts-f4588fd11....