The profile map is cached at the location
For admin: C:\ProgramData\Microsoft\AzurePowerShell\ProfileCache
For user: %localappdata%\Microsoft\AzurePowerShell\ProfileCache
When someone used Az.Bootstrapper on the machine and then go back to AzureRm.BootStrapper , they may run in to this issue
The AzureRm.BootStrapper will use the Az map, try to install Az modules and fail
