Salto has several Deployment Preview Errors that might surface when deploying records that have ISO codes in orgs that have multi-currency (MC) enabled.
The Preview Errors are all about ensuring that the currencies between the source and target org match to prevent inconsistencies and deployment failures.
With this said, you may encounter warnings when:
The target org doesn't have MC enabled, and you are deploying records with ISO code values
Both orgs have MC enabled, but the available ISO code values do not match
In general, we recommend that if you are using MC, you ensure all orgs in your pipeline have it enabled and that all of them have the same ISO code values enabled as well.
You can learn more about deployment preview errors here.