CHW-4812 UploadVersionConflict
this package version already exists; delete it first to republish, or publish a new version
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Default message: this package version already exists; delete it first to republish, or publish a new version
HTTP status:409(client)
Problem. Upload refused because the (package, version) pair
already exists. Cause. Package versions are immutable; once
published, the same version cannot be overwritten. Fix. Delete
the existing version first or bump the version number and republish.
HTTP 409.