vine: correctly assign to cache_level when file is reused

[btovar]

Proposed Changes

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Merge Checklist

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• make test Run local tests prior to pushing.
• make format Format source code to comply with lint policies. Note that some lint errors can only be resolved manually (e.g., Python)
• make lint Run lint on source code prior to pushing.
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[dthain]

Aha, good catch!

[btovar]

I'm surprised the compiler didn't picked it up, as it is the incorrect enum type.