Create keyvault secret - Operation returned an invalid status code 'Conflict' - azure-powershell

Question

I want to create multiple secrets in keyvault. Assign dynamic values of Blobstorage account, Batch account.
I tried below code to create secrets:
Function CreateKeyvaultSecrets
{
Param
(
[Parameter(Mandatory=$true, Position=0)]
[string] $keyvaultName,
[Parameter(Mandatory=$true, Position=1)]
[string] $blobStorageAccountName,
[Parameter(Mandatory=$true, Position=2)]
[string] $batchaccountName,
[Parameter(Mandatory=$true, Position=3)]
[string] $logRgName
)
#Get Storagekey
$blobStorageKeyObject = (Get-AzStorageAccountKey -ResourceGroupName $logRgName -AccountName $blobStorageAccountName)| Where-Object {$_.KeyName -eq "key1"}
$blobStorageKey = $blobStorageKeyObject.Value
$blobStorageConnectionString = "DefaultEndpointsProtocol=https;AccountName=$blobStorageAccountName;AccountKey=$blobStorageKey;EndpointSuffix=core.windows.net"
#Create blobstorage key secret
$blobSecretkey = ConvertTo-SecureString -String $blobStorageKey -AsPlainText -Force
Set-AzKeyVaultSecret -VaultName $keyvaultName -Name 'blobstorageaccesskey' -SecretValue $blobSecretkey
#Create blobstorage connectionstring key secret
$blobconnectionstringSecret = ConvertTo-SecureString -String $blobStorageConnectionString -AsPlainText -Force
Set-AzKeyVaultSecret -VaultName $keyvaultName -Name 'blobstorageconnectionstring' -SecretValue $blobconnectionstringSecret
Write-host "Blob Storage Account connection string added to Keyvault secret"
}
CreateKeyvaultSecrets 'kvtevalmock' 'steval' 'abtaeval' 'rg-eval'
I am trying to execute above code from Azure DevOps Powershell task. Azure powershell version is 5.
Secrets are not getting creating. Below error is thrown:
WARNING: Upcoming breaking changes in the cmdlet 'Set-AzKeyVaultSecret' :
- The output type 'Microsoft.Azure.Commands.KeyVault.Models.PSKeyVaultSecret' is changing
- The following properties in the output type are being deprecated : 'SecretValueText'
- The change is expected to take effect from the version : '3.0.0'
Note : Go to https://aka.ms/azps-changewarnings for steps to suppress this breaking change warning, and other
information on breaking changes in Azure PowerShell.
##[error]Operation returned an invalid status code 'Conflict'
##[error]PowerShell exited with code '1'.

Answer 1

I test your script on my side, it works fine.
From the error message, looks your Az.KeyVault powershell module version is too old, my version is 3.4.0, try to update it with the command below.
Update-Module -Name Az.KeyVault -Force
After the update, close all the powershell sessions and open a new one to try again, it should work.