When using Unity 2022.3.22f1 with VRChat SDK 3.10.1 (older versions might be affected too), then "VRC Avatar Descriptor" component is detecting the wrong unity version. "Pipeline Manager" is detecting the correct unity version.
The Avatar Descriptor got imported. in debug view of the component i can just change the version number for "VRC Avatar Descriptor". It get's updated in Pipeline Manager automatic.
The Version might never update when imported from an older Unity version. This seems not to cause any technical issues.