Build your migration's gap list before you start, and make the differ refuse to guess Key takeaways END STATE: a list of what your migration will NOT carry, produced from your own inventory before day one, with partials called out separately. Coverage is THREE-state, not two. Custom fields are ...
Source: [Dev.to](https://dev.to/mihai_leanzero/build-your-migrations-gap-list-before-you-start-and-make-the-differ-refuse-to-guess-37pn)