How to remove required field validation of a parent class

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MVC

Hi All,


I have a two classes which is having Required field for ListName. One is a Parent class. How can I avoid or escape the validation for Parent class. I have tried with
ModelState.Remove("ContactModel_ListName"); But its not working.

Below is my model class:

public class ContactModel : BaseModel
   {
       public int UserId { get; set; }
       public int ListId { get; set; }

      
       [Required]
       [Display(Name = "List Name")]
       public string ListName { get; set; }
}


public class ContactUserModel
    {
        public ContactModel ContactModel { get; set; }
               
    }