Using a custom image to create a virtual machine failure, prompt the quota

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[Template Name goes here](Template link goes here)

### Issue Details
I use the cli to upload images, uploaded successfully, but using a custom image to create a virtual machine failure, prompt the quota.

Use unmanaged disk to create a VM, report the error：
The template deployment 'vm_deploy_667HUPutnCXTxZljX6EMUbFuPJDuwR7r' is not valid according to the validation procedure. The tracking id is 'bd5f097e-b47c-41b4-a22f-d28074aa490c'. See inner errors for details. Please see https://aka.ms/arm-deploy for usage details. Operation results in exceeding quota limits of Core. Maximum allowed: 4, Current in use: 4, Additional requested: 1.

Using managed disks：
[root@vm-onos ~]# az disk create --resource-group evan --name myManagedDisk \
> --source https://evanstorageaccount.blob.core.windows.net/image/xxx.vhd
Only blobs formatted as VHDs can be imported.
[root@vm-onos ~]#

Thanks,

### Repro steps (*if necessary, delete otherwise*)
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Start by reproducing the Azure CLI custom-image workflow described in the issue, including unmanaged and managed disk commands, and inspect the deployment error details. The issue does not name a template, test, or source file; it would need a specific reproducible failure and a confirmed resolution for the quota or VHD-import behavior to be considered done.

Written by the indexing model from the issue text.