if we compare those two packages
https://www.npmjs.com/package/@microsoft/msgraph-sdk-admin?activeTab=dependencies
https://www.npmjs.com/package/@microsoft/msgraph-beta-sdk-admin?activeTab=dependencies
We can see the v1 package has a dependency on msgraph-sdk but the beta one is missing a dependency on msgraph-beta-sdk
This is going to be an issue for people installing the admin (or other) package directly as they'll have broken references.
We should add the beta models package as a dependency to all other packages