What after deploy message "map extension IDs to other copies" means?

[Antonio]

I just did the migration of the 3 versions of my application:

• the dev version for local development
• the review version for reviewing big changes
• the prod version for prod version

I did the first two last weekend and the new one this morning. After the production one I received this message that I don’t understand.

Someone can explain to me why it is needed?

[JordanFinners]

With the new dev platform, extensions get a uid to identify them. It’s saying you need to add the uid into the other config files.

As you will have noticed these uids be generated and added to your toml file, when working with them

There’s more info here Migrate from the Partner Dashboard

[NickWesselman]

More details here as well!

Simpler app deploys with extension user identifiers

Hello Shopify app developers! As we roll out migrations from Partners to the Next-gen Dev Platform, those of you with extensions in your apps should familiarize yourselves with the necessary migration steps. Among these is the migration to extension user identifiers, or UIDs, in the shopify.extension.toml. These new identifiers change how your local extensions are mapped to their records on Shopify, so it’s worth double-clicking on what is changing here, and why. Why are we making this change? D…

It sounds like you already completed all copies of your app, so no additional steps should be needed. This message is generic and doesn’t actively look to see if the apps for those TOML files have completed their post-migration steps.