I'm getting an error thrown at this location, but the INSERT is successful prior to the error works.  I've done a lot of searching for the answer, but I can not find what I'm looking for.  There is NO innerexception information.  The error is 

      public void AddImpactCategory(OperationalImpactCategory category)
        {
            using (IDataContext ctx = DataContext.Instance())
            {
                ctx.GetRepository<OperationalImpactCategory>().Insert(category);
            }
        }

    [TableName("BB_OpImpactCategory")]
    [PrimaryKey("OpImpactCatID", AutoIncrement = true)]
    [Cacheable("ImpactCategory", CacheItemPriority.Default, 20)]
    [Scope("ModuleId")]
    [JsonObject(MemberSerialization.OptIn)]
    public class OperationalImpactCategory
    {
        
        [ColumnName("OpImpactCatID")]
        [JsonProperty]
        public int ID { get; set; }
        [JsonProperty]
        public string Title { get; set; }
        [JsonProperty]
        public bool IsActive { get; set; }
        [JsonProperty]
        public DateTime CreatedOn { get; set; }
        [JsonProperty]
        public string CreatedBy { get; set; }
        [JsonProperty]
        public DateTime ModifiedOn { get; set; }
        [JsonProperty]
        public string ModifiedBy { get; set; }
    }


        [AllowAnonymous]
        [HttpPost()]
        public string AddImpactCategory([FromBody]string cat)
        {
            try
            {
                //UserInfo uInfo = ucon.GetCurrentUserInfo();
                OperationalImpactCategory ob = JsonConvert.DeserializeObject<OperationalImpactCategory>(cat, jsonSet);

                con.AddImpactCategory(ob);

                return "Success!";

            }
            catch(Exception ex)
            {
                return ex.Message;

            }
            
        }


Stack Trace:

at DotNetNuke.Data.RepositoryBase`1.GetPropertyValue[TProperty](T item, String 
propertyName) at DotNetNuke.Data.RepositoryBase`1.ClearCache(T item) at 
Modules.BudgetWorksheet.Components.DataController.AddImpactCategory(OperationalImpactCategory 
category) in 
C:\DNNDEV\DesktopModules\BudgetWorksheet\Components\DataController.cs:line 121 

Any assistance is appreciated.