Pinia's `$patch()` function will merge the given state with the current
state, instead of doing a replacement. As a result, going from an active
job with metadata fields `A` and `B`, to a job with metadata fields `B`
and `C` would actually have fields `A`, `B`, and `C` in the Pinia store.
This is resolved by replacing the `$patch(object)` with `$patch(function)`
and having that function replace the entire job.
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