Error: Cannot read properties of undefined (reading 'startsWith')

[dnlmzw]

I spent some time updating from V2 to V3 and everything seems to work well. However, I'm getting this error which I can't figure out how to get rid of:

Error: Cannot read properties of undefined (reading 'startsWith')
TypeError: Cannot read properties of undefined (reading 'startsWith')
    at _renderSegmentName (http://localhost:3333/node_modules/.sanity/vite/deps/chunk-3XIYEXQG.js?v=fc27db5e:73384:11)
    at http://localhost:3333/node_modules/.sanity/vite/deps/chunk-3XIYEXQG.js?v=fc27db5e:73367:137
    at Array.map (<anonymous>)
    at http://localhost:3333/node_modules/.sanity/vite/deps/chunk-3XIYEXQG.js?v=fc27db5e:73365:1099
    at Array.map (<anonymous>)
    at SchemaProblemGroups (http://localhost:3333/node_modules/.sanity/vite/deps/chunk-3XIYEXQG.js?v=fc27db5e:73360:84)
    at renderWithHooks (http://localhost:3333/node_modules/.sanity/vite/deps/chunk-ZKPHHQQV.js?v=fc27db5e:16175:26)
    at mountIndeterminateComponent (http://localhost:3333/node_modules/.sanity/vite/deps/chunk-ZKPHHQQV.js?v=fc27db5e:18904:21)
    at beginWork (http://localhost:3333/node_modules/.sanity/vite/deps/chunk-ZKPHHQQV.js?v=fc27db5e:19859:22)
    at beginWork$1 (http://localhost:3333/node_modules/.sanity/vite/deps/chunk-ZKPHHQQV.js?v=fc27db5e:23660:22)

[wrux]

I remember seeing this issue when migrating, but I cannot remember the cause. I could be wrong, but it might be an issue with some incorrect schema.