Possible regression bug - safe-outputs fails on uploading artifacts

[molson504x]

After upgrading gh aw to version v0.62.1, the safe-outputs step in the workflows is consistently failing on both ARC runners and github-hosted runners. The failure is on artifact upload:

2026-03-19T18:05:19.6749359Z ##[group]Run actions/upload-artifact@bbbca2ddaa5d8feaa63e36b76fdaad77386f024f
2026-03-19T18:05:19.6750155Z with:
2026-03-19T18:05:19.6750370Z   name: agent
2026-03-19T18:05:19.6750594Z   path: /tmp/gh-aw/safe-output-items.jsonl
2026-03-19T18:05:19.6750890Z   if-no-files-found: ignore
2026-03-19T18:05:19.6751130Z   compression-level: 6
2026-03-19T18:05:19.6751336Z   overwrite: false
2026-03-19T18:05:19.6751543Z   include-hidden-files: false
2026-03-19T18:05:19.6751768Z   archive: true
2026-03-19T18:05:19.6751948Z env:
2026-03-19T18:05:19.6752134Z   GH_AW_INFO_FIREWALL_ENABLED: false
2026-03-19T18:05:19.6752567Z   GH_AW_CALLER_WORKFLOW_ID: mdo-test-org/agentic-mulesoft-build-publish/maven-build-publish
2026-03-19T18:05:19.6753004Z   GH_AW_ENGINE_ID: copilot
2026-03-19T18:05:19.6753237Z   GH_AW_WORKFLOW_ID: maven-build-publish
2026-03-19T18:05:19.6753530Z   GH_AW_WORKFLOW_NAME: Maven Build and Publish
2026-03-19T18:05:19.6753839Z   GH_AW_AGENT_OUTPUT: /tmp/gh-aw/agent_output.json
2026-03-19T18:05:19.6754175Z   GH_HOST: github.com
2026-03-19T18:05:19.6754372Z ##[endgroup]
2026-03-19T18:05:19.8382394Z With the provided path, there will be 1 file uploaded
2026-03-19T18:05:19.8396027Z Artifact name is valid!
2026-03-19T18:05:19.8410284Z Root directory input is valid!
2026-03-19T18:05:20.0833560Z ##[error]Failed to CreateArtifact: Received non-retryable error: Failed request: (409) Conflict: an artifact with this name already exists on the workflow run

An artifact with the name "agent" is being uploaded during the agent job which is the cause of this collision.

[pelikhan]

sounds like a regression for sure.