Azure blob storage - kentico website project

Hello All,

I have a website with two environments (in azure app services).

1. Main site in production slot
2. Test site in another slot in same app service

Also I have a storage account, containg two blob containers( Prod & Test).

In my app code module class, I am using the CustomRootPath different for both environments. Below is for my Prod site and

protected override void OnInit()
    {
        base.OnInit();
        // Creates a new StorageProvider instance
        var mediaProvider = new StorageProvider("Azure", "CMS.AzureStorage");

        // Specifies the target container
        mediaProvider.CustomRootPath = "Prod";

        // Makes the container publicly accessible
        mediaProvider.PublicExternalFolderObject = true;

        // Maps a directory to the provider        
        StorageHelper.MapStoragePath("~/mysite/files/", mediaProvider);        
    }

Below is for my test site

protected override void OnInit()
    {
        base.OnInit();
        // Creates a new StorageProvider instance
        var mediaProvider = new StorageProvider("Azure", "CMS.AzureStorage");

        // Specifies the target container
        mediaProvider.CustomRootPath = "Test";

        // Makes the container publicly accessible
        mediaProvider.PublicExternalFolderObject = true;

        // Maps a directory to the provider        
        StorageHelper.MapStoragePath("~/mysite/files/", mediaProvider);        
    }

All the attachments in Prod site are working fine using kentico urls, but not working with Test site urls.

Both the blob containers having the same data.

I am accessing the attachment/media using the below URL formats

https://prodsite.com/CMSPages/GetFile.aspx?guid=487cb5d3-2d00-4197-b4e3-e321599ab6cd

https://testsite.com/CMSPages/GetFile.aspx?guid=487cb5d3-2d00-4197-b4e3-e321599ab6cd

The first URL is working fine but the second URL is getting the message "The resource you are looking for has been removed, had its name changed, or is temporarily unavailable."

Please help me to resolve the above issue.

Thanks!