Parameter out of range on db.SaveChanges () in EF

I am developing an MVC application with Entity Framework. I am using the first database approach and there is a numeric field in my database:

[N15]  NUMERIC (1, 1)  NULL,

      

        
        
        
      

    

My code where I am getting the error:

public ActionResult allsave(VchrViewModel v)
{  
    List<TrD> chklist = this.dt;
    if (br.vchrbalance(chklist) == true)
    {
        trm = v.master;
        trm.S100 = vt;
        var n = db.TrMs.Max(x => x.N100);
        trm.N100 = n + 1;
        trm.S104 = getmonth(trm.D1.ToString());
        trm.S103 = getyear(trm.D1.ToString());
        db.TrMs.Add(trm);
        db.SaveChanges();
        seid = 0;
        var s = this.dt;
        foreach (TrD trd in s)
        {
            trd.S100 = vt;
            var d = db.TrDs.Max(x => x.N100);
            trd.N100 = d + 1;
            trd.N101 = v.master.N100;
            db.TrDs.Add(trd);

            db.SaveChanges();
            TrnYes4MST(trd.S1);
        }
        return Json(new { msg = "Y" });
    }
    else
    {
        return Json(new { msg = "N" });
    }
}

      

        
        
        
      

    

I am getting records for two different tables from a view. I have successfully saved a record in the first table named "TrM" which is irrelevant for N15. But in foreach loop for table "TrD" for first iteration N15 = 1. But by db.SaveCHanges () method I get following error.

Parameter {1.0} is out of range

      

        
        
        
      

    

I restored the edmx file but couldn't solve it.