Dropdowndatagrid inside of datagrid

Radzen.Blazor Components
1

Hi,
I have a data grid and this dropdown is inside one of the columns. I want to pass the value of drop down to this grid column. Is there a way to do it?

...
<RadzenDataGridColumn TItem="OrderDetail" Property="VendorName" Title="Vendor" Width="200px">
                                 <EditTemplate Context="orderDetail">
                                     <RadzenDropDownDataGrid TValue="string"  AllowFiltering="true" AllowClear="true" FilterCaseSensitivity="FilterCaseSensitivity.CaseInsensitive" FilterOperator="StringFilterOperator.StartsWith"
                                                             Data=@_vendors Count="5" TextProperty="Name" ValueProperty="Name"
                                                             Class="w-100" @bind-Value="orderDetail.VendorName"/>
                                       
                                     <RadzenRequiredValidator Text="Vendor Name is required" Component="VendorName" Popup="true" Style="position: absolute"/>
                                 </EditTemplate>
                             </RadzenDataGridColumn>
...

I am getting this error;

      System.InvalidOperationException: Cannot find component with Name VendorName
            at Radzen.Blazor.ValidatorBase.ValidateModel(Object sender, ValidationRequestedEventArgs args)
            at Microsoft.AspNetCore.Components.Forms.EditContext.Validate()
            at Radzen.Blazor.RadzenDataGrid`1.UpdateRow(TItem item)
            at IMS.WebApp.Pages.Orders.OrderList.SaveRowDetail(OrderDetail orderDetail) in C:\Users\197199\Source\Repos\IMS.WebApp\IMS.WebApp\Pages\Orders\OrderList.razor:line 370
            at Microsoft.AspNetCore.Components.ComponentBase.CallStateHasChangedOnAsyncCompletion(Task task)
            at Radzen.Blazor.RadzenButton.OnClick(MouseEventArgs args)
            at Microsoft.AspNetCore.Components.ComponentBase.CallStateHasChangedOnAsyncCompletion(Task task)
            at Microsoft.AspNetCore.Components.RenderTree.Renderer.GetErrorHandledTask(Task taskToHandle, ComponentState owningComponentState)

While trying to save;

<EditTemplate Context="detail">
                                     <RadzenButton Icon="check" ButtonStyle="ButtonStyle.Primary" Class="m-1" Click="@(args => SaveRowDetail(detail))">
                                     </RadzenButton>
  </EditTemplate>
    
 .....
    
 async Task SaveRowDetail(OrderDetail orderDetail)
     {
         if (orderDetail == _detailToInsert)
         {
             _detailToInsert = null;
         }
    
         await _gridDetail.UpdateRow(orderDetail);
     }

Do OrderDetail and Vendor entities have to have a relationship in order to save? I look forward to your help and guidance.

Thank you.