[Resources] Bugfix New-Az*DeploymentStacks cmdlets conditional change (#22462)

* bugfix for conditional change in stacks New cmdlets

* added changelog entry

* adjusted changelog

* adjusted changelog to remove version

Author: dantedallag

src/Resources/ResourceManager/Implementation/DeploymentStacks/NewAzManagementGroupDeploymentStack.cs

@@ -230,7 +230,7 @@ protected override void OnProcessRecord()
                     WriteObject(deploymentStack);
                 };
 
-                if (!Force.IsPresent && currentStack == null)
+                if (!Force.IsPresent && currentStack != null)
                 {
                     string confirmationMessage = $"The DeploymentStack '{Name}' you're trying to create already exists in ManagementGroup '{ManagementGroupId}'. " +
                         $"Do you want to overwrite it\n?" +

src/Resources/ResourceManager/Implementation/DeploymentStacks/NewAzResourceGroupDeploymentStack.cs

@@ -217,7 +217,7 @@ protected override void OnProcessRecord()
                     WriteObject(deploymentStack);
                 };
 
-                if (!Force.IsPresent && currentStack == null)
+                if (!Force.IsPresent && currentStack != null)
                 {
                     string confirmationMessage = $"The DeploymentStack '{Name}' you're trying to create already exists in ResourceGroup '{ResourceGroupName}'. " +
                         $"Do you want to overwrite it?\n" +

src/Resources/ResourceManager/Implementation/DeploymentStacks/NewAzSubscriptionDeploymentStack.cs

@@ -224,7 +224,7 @@ protected override void OnProcessRecord()
                     WriteObject(deploymentStack);
                 };
 
-                if (!Force.IsPresent && currentStack == null)
+                if (!Force.IsPresent && currentStack != null)
                 {
 
                     string confirmationMessage = $"The DeploymentStack '{Name}' you're trying to create already exists in the current subscription. " +

src/Resources/Resources/ChangeLog.md

@@ -19,6 +19,7 @@
 -->
 
 ## Upcoming Release
+* Fixed the warning prompt condition check in New-Az*DeploymentStack cmdlets.
 
 ## Version 6.9.0
 * Fixed the issue that `New-AzRoleAssignment` didn't work without subscription.