Upgrade Octopus Server to 2024.1.12875, 2024.2.9235, 2024.3.4044, or any 2024.4+ release, which contain the fix. The deployment itself succeeds and only the release bookkeeping fails, so this is safe to patch without redeploying everything. Confirm the release step completes cleanly after the upgrade.

Context: GitHub issue OctopusDeploy/Issues#8727 (closed): deploying a nupkg to an Azure App Service fails the release-package part with The file already exists, although the package itself deploys. A maintainer confirms the fix shipped in specific releases.