asp.net mvc - System.data.entity.validation.DbEntityValdationException Error Come when save the data -

this controller

public jsonresult savebillingsystemparameters(billingsystemparameters model)         {             var id = -1;             //initialize newid variable              var userid = helpers.getloggedinuserid();             var currentdate = helpers.getinvariantculturedatetime();             var defaultcorporateid = helpers.getsysadmincorporateid();              //check if model not null             if (model != null)             {                 using (var bal = new billingsystemparametersbal())                 {                     model.corporateid = defaultcorporateid;                     if (model.id > 0)                     {                         model.modifiedby = userid;                         model.modifieddate = currentdate;                     }                     else                     {                         model.createdby = userid;                         model.createddate = currentdate;                         model.corporateid = helpers.getsysadmincorporateid();                     }                      //call addbillingsystemparameters method add / update current billingsystemparameters                     id = bal.savebillingsystemparameters(model);                 }             }             return json(id);         }  //bal class  public int savebillingsystemparameters(billingsystemparameters model)         {             using (var rep = unitofwork.billingsystemparametersrepository)             {                 if (model.id > 0)                 {                     var current = rep.getsingle(model.id);                     model.createdby = current.createdby;                     model.createddate = current.createddate;                     rep.updateentity(model, model.id);                 }                 else                     rep.create(model);                  return model.id;             }         } 

i getting following error

do exception message says, inspect entityvalidationerrror exception means you're trying break constraint varchar filed width if browse through param you'll more details on type of constrain savechanges() tried brake