In the Test environment, a constant named PV_TXT_TEST already exists. If a developer creates a new constant with the same name in the Development environment and deploys it to Test, what happens during deployment?

In this scenario, the deployment fails because a constant with the same name already exists in the target (Test) environment.

Deployment will processed but when you checked deployment logs:

Shows The constant AV_TEST_TEXT_CONSTANT already existed in the Test environment.
During import, Appian attempted to create the constant rather than map or overwrite it.
Appian enforces name uniqueness for constants within an environment, so the import failed with the error:

Name is insufficiently unique (APNX-1-4071-007)

This confirms that:

Compare & Deploy may appear to proceed initially,
but during the import phase, Appian detects the duplicate name and rejects the object,
causing the deployment to complete with Errors, even though the package itself was successfully imported.

Answer