With my currently very primitive understanding of this mechanism, it seems the lens info in the JPEG file contains a numeric ID which matches many possible lenses, then further refinement is performed based on aperture and perhaps other parameters. The matching seems to work fine. What you want is a change in hierarchy - if the LensModel tag is set, use that instead of the LensID (which is a composite tag, you can’t edit it), and that is probably a request for RawTherapee and not for ExifTool. However, since RawTherapee is (hopefully?) switching over to Exiv2 in 5.7, there is no need to open an issue - it already works in the latest metadata-exiv2 branch.
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