[Idea] Option to fail deployment, when app version is lower than already installed version

[thomasroennTRM]

Idea Description

Is your feature request related to a problem?
When deploying apps via AL-Go CI/CD or Publish To Environment, if the app version in app.json is lower than the version already installed on the target environment, the workflow completes successfully (green checkmark). The only indication of failure is an annotation/warning message:

App Customer App is already installed in version 26.25.92.3262, which is higher than 26.25.90.3279, used in app.json. In order to install version 26.25.90.3279, the higher version must be uninstalled first

This is misleading because:

• The app was not actually deployed/updated
• The workflow reports success, giving teams false confidence that the deployment went through
• In CI/CD pipelines with multiple environments, a "green" run is typically the only signal teams monitor

Describe the solution you'd like
A new setting (e.g., failOnDowngrade or similar) in the DeployTo structure (or as a general deploy setting) that controls the behavior when a version downgrade is detected during deployment:

{ "DeployToProduction": { "EnvironmentName": "Production", "failOnDowngrade": true } }

When failOnDowngrade is true, the deploy step should return an error (red/failed) instead of succeeding with only an annotation warning.

Alternatively, this could be a global deployment setting like:
{ "deployFailOnDowngrade": true }

Describe alternatives you've considered

• Manually checking annotations after each deployment - not scalable
• Always ensuring version numbers are bumped correctly - prone to human error, especially across release branches

Additional context
This affects any team working with release branches or hotfix workflows where version numbers on environments may get ahead of what's in app.json on certain branches. The silent "success" makes it very difficult to catch deployment issues early.

Contribution (Optional)

• I would be open to contributing to this idea (implementation, documentation, testing, etc.)

[AlexanderMarcher]

I agree, this should be looked into. I previously also raised this issue on #2077 (comment)