[garymoon]

I upgraded from 11 to 12 like one year ago and from 12 to 13 some days ago (upgrade to 14 seems that will be straightforward) but in my case what I did:

  - Don't upgrade directly from 12 to 14, go to 13 first
  - If you have warnings after moving from 11, fix them first
  - Run the 0.13upgrade command in your code that will generate the required_providers
  - Run terraform-v13 init
  - Change to correct workspace if using some
  - Run terraform-v13 plan which will probably fail due to the new explicit required-providers rule, if that happens you need to modify the state with the correct providers https://www.terraform.io/upgrade-guides/0-13.html#why-do-i-see-provider-during-init- . In my case I have a lot of modules so I created an script that automated that process
  - Execute again terraform-v13 plan and verify that it will not make uncommon changes
  - Then run terraform-v13 apply.

[matwood]

> Don't upgrade directly from 12 to 14, go to 13 first

The line above, plus running apply in each version is key. I literally just did the update from 11->latest for 3 different repos a couple of weeks ago. And tbh, its was only the first update where I had to make any code changes. The rest mostly worked.