Delete the deployments through PowerShell.
$subscription = ‘xxxxxxxxxxxxxxxxxxxxxxxxxx’
$resourceGroupName = ‘rg-aue-ms-dev-nonnative’
Connect-AzAccount
Select-AzSubscription -Subscription $subscription
$deployments = Get-AzResourceGroupDeployment -ResourceGroupName $resourceGroupName
foreach($deployment in $deployments)
{
Remove-AzResourceGroupDeployment -Name $deployment.DeploymentName -ResourceGroupName $resourceGroupName -Verbose
}