Updating error messaging

[jonwihl]

Description:

Updates the error message to be more actionable.

Workflow steps:

(How does one use this feature, and how has it changed)

Documentation links affected:

(list any documentation links that you created, or existing ones that you've identified as needing updates, along with a brief description)

Notes for reviewers:

(anything that might help someone review this PR)

[JustinASmith]

LGTM

[danielnelson]

I don't think we should reference UI operations in the errors, can we rephrase it to be more interface agnostic? Perhaps something like: changing from delta updates to standard updates is not allowed without backfilling.