### Describe the bug The scenario only happens when there is a multi-level key usage ### Reproduction [Playground reproduction](https://azure.github.io/typespec-azure/playground/?c=aW1wb3J0ICJAdHlwZXNwZWMvaHR0cCI7CtIZcmVzdNUZdmVyc2lvbmluZ8wfYXp1cmUtdG9vbHMvyCstxhVjb3Jl3yvIK3Jlc291cmNlLW1hbmFnZXIiOwoKdXNpbmcgSHR0cDvHDFJlc3TIDFbpAI7IEkHESi5Db3JlzhJSx1xNxls7CgovKiogQ29udG9zb8RUxR4gUHJvdmlkZXIg5gCDbWVudCBBUEkuICovCkBhcm3IIE5hbWVzcGFjZQpAc2VydmljZSgjeyB0aXRsZTogIsdXyC1IdWJDbGllbnQiIH0pCkDnAUNlZCjnAL9zKQpuyFAgTWljcm9zb2Z0LtJG7wC2QVBJIMdNc%2BQAoWVudW3oARNzIHsKICDELjIwMjEtMTAtMDEtcHJldmlld8g1xDQgIEB1c2VEZXBlbmRlbmN5KPUBLy7IVi52MV8wX1DGSF8xKcRAYXJtQ29tbW9uVOQBz8cq10jLKctUNcRIYPIAqWAsCn0KCkBkb2MoIkEgT3JnYW5pemF05AC7yFkgYnkgU29sYXJXaW5kcyIpCm1vZGVsIEVtcGxveWVlyCcKICBpcyBUcmFja2VkyBU8yCZQcm9wZXJ0aWVzPuUBN0BrZXkoIm%2FLcOQB8CLlAO5wYXR0ZXJuKCJeW2EtekEtWjAtOV8tXSokxh9zZWfkAjXOPuQAmCAg5gDIxEogb2YgdGhl7QDScyDoAv%2FJaGgKICDkAhk6IHN0cuUC5AogIC4uLvYBW0xlZ2FjeS7GD2RT5gKWSWRlbnRpdHlWNOcA5Hk75AFTaW50ZXJm5AJvT3BlcucAgGV4dGVuZHP2AzEuyyl75AGVYXJtyCPKG8tZ6AFc5QKJCiAgICBsaXN0QnnINUdyb3Vw5AGVQcpJTMUiUGFyZW506QGdyB0%2B5QC65wIO6gGyIOQEQWlmaWMgdG%2FlAVXqAg4gT2LkA51hYmlsaXR57gJA6wFt7gIyy1p75AFwxnBTV84%2FcMkm5QGuc8l0zCbKSz86IHVzZXLKEeUBy0B2aXNp5gCdKExpZmVjeWNs5AF5YWTqAi9MaWZ0cukAriBwcmVmZXJlbmNlLiBUaMQQaW9y5ADd5wJSyCku5QCXbMQ96AFAUMk7PzogaW50MzLlAVHxAVDHSusBR2FjY291bnTpASvuAMvmAzLFRlVzZXIgaWTFfMQlSWQ%2F7QK8xiZBIHRhZyBydWxlIGJlbG9uZ%2BQFpnRv1nIgxC1SdWzkALXEB3PsAgbfSs5KQHDlAljoAQ8o8AJg6ADexWbkAplQcm946QKvPMUX9gQp5ACBU2V06gQk6QQF5wC85wQA%2FwQ78QQfVMY%2ByT3kBBD%2BAjTuBC7pAd7kAirpB13pAzDqAsQgZm9yIHRoaeoEhOQCQOsBD%2B8B7mNvbG9yy2g%3D&e=%40azure-tools%2Ftypespec-autorest&options=%7B%22linterRuleSet%22%3A%7B%22extends%22%3A%5B%22%40azure-tools%2Ftypespec-azure-rulesets%2Fresource-manager%22%5D%7D%7D) ### Checklist - [x] Follow our [Code of Conduct](https://github.com/azure/typespec-azure/blob/main/CODE_OF_CONDUCT.md) - [x] Check that this issue is about the Azure libraries for typespec. For bug in the typespec language or core libraries file it in the [TypeSpec repo](https://github.com/Microsoft/TypeSpec/issues/new/choose) - [x] Check that there isn't already an issue that request the same bug to avoid creating a duplicate. - [x] The provided reproduction is a [minimal reproducible example](https://stackoverflow.com/help/minimal-reproducible-example) of the bug.