EF Core Exception Details

Question

How do I load the the nested property collection within the datamodel.

EF Core SQL Data Exception : "Invalid Column Name SipKpiID" when I try to run the code below:

public List<SipKpi> GetSpiKpiMaster()
{
         return _db.SipKpi.Include(x => x.SipKpiCriteria).Include(x => 
                        x.SIPPointSlabDetails).ToList();
}

Below is the code for dataModel class

public class SipKpi 
{
        [Key]
        public int SipKpiID { get; set; }

        public int CountryId { get; set; }
        public string CountryCode { get; set; }
        public int BusinessId { get; set; }

        public string BusinessGroupCode { get; set; }

        public string SipKpiName { get; set; }

        public string EvaluationMethod { get; set; }

        public int MinimumPointsEligibility { get; set; }

        public int MinimumKPICriteriaEligibility { get; set; }

        public string KPIPayoutType { get; set; }

        public string KPIPayoutFrequency { get; set; }

        public bool BusinessTargetFlag { get; set; }

        public bool BusinessProductTargetFlag { get; set; }

        public bool SalesBusinessTargetFlag { get; set; }

        public bool SalesBusinessProductTargetFlag { get; set; }

        public virtual ICollection<SipKpiCriteria> SipKpiCriteria { get; set; }

        public virtual ICollection<SIPPointSlabDetails> SIPPointSlabDetails { get; set; }
    }