Hi @Toriyama ,
In fact, any SharePoint Framework project has two different kinds of versions. The more project oriented version number is stored in the ‘package.json’. The web part related is stored in the ‘package-solution.json’ inside the config folder.
Both are valid versions of your project, but they are not in sync and needs to be updated individually. For SharePoint you can update the package-solution file. For the overall project you update the ‘package.json’ in the root folder.
Currently there is no tooling support available that allows you to update the version of your web part solution file. You can update the version number manually by editing the ‘package-solution.json’.
You can make a reference to the document
https://learn.microsoft.com/en-us/sharepoint/dev/spfx/toolchain/update-latest-packages
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