Adding User Field to Master Financial Calendar

I need to add a column to the grid of Master Financial Calendar.

I managed to add it but it doesn’t update even if I save it. 

I checked the table FinPeriod in the database and confirmed that the value is not saved.

I already created an Extension Class for both FinPeriod and MasterFinPeriod.

namespace PX.Objects.GL.FinPeriods.TableDefinition
{
    // Acuminator disable once PX1016 ExtensionDoesNotDeclareIsActiveMethod extension should be constantly active
    public sealed class FinPeriodExt : PXCacheExtension<PX.Objects.GL.FinPeriods.TableDefinition.FinPeriod>
    {
        #region UsrIsFiscalYear
        [PXDBBool]
        [PXUIField(DisplayName = "Is Fiscal Year")]
        [PXDefault(false, PersistingCheck = PXPersistingCheck.Nothing)]
        public bool? UsrIsFiscalYear { get; set; }
        public abstract class usrIsFiscalYear : PX.Data.BQL.BqlBool.Field<usrIsFiscalYear> { }
        #endregion

        #region UsrQuarter
        [PXDBInt()]
        [PXUIField(DisplayName = "Quarter")]
        [PXIntList(
                new int[]
                {
                    Quarters.FirstQuarter,
                    Quarters.SecondQuarter,
                    Quarters.ThirdQuarter,
                    Quarters.FourthQuarter
                },
                new string[]
                {
                    FTSIBIRCustomizations.Messages.FirstQuarter,
                    FTSIBIRCustomizations.Messages.SecondQuarter,
                    FTSIBIRCustomizations.Messages.ThirdQuarter,
                    FTSIBIRCustomizations.Messages.FourthQuarter
                })]

        public int? UsrQuarter { get; set; }
        public abstract class usrQuarter : PX.Data.BQL.BqlString.Field<usrQuarter> { }
        #endregion
    }
}

namespace PX.Objects.GL.FinPeriods
{
    // Acuminator disable once PX1016 ExtensionDoesNotDeclareIsActiveMethod extension should be constantly active
    public sealed class MasterFinPeriodExt : PXCacheExtension<PX.Objects.GL.FinPeriods.MasterFinPeriod>
    {
        #region UsrIsFiscalYear
        [PXUIField(DisplayName = "Is Fiscal Year")]
        [PXDefault(false, PersistingCheck = PXPersistingCheck.Nothing)]
        public bool? UsrIsFiscalYear { get; set; }
        public abstract class usrIsFiscalYear : PX.Data.BQL.BqlBool.Field<usrIsFiscalYear> { }
        #endregion

        #region UsrQuarter
        [PXUIField(DisplayName = "Quarter")]
        [PXIntList(
                new int[]
                {
                    Quarters.FirstQuarter,
                    Quarters.SecondQuarter,
                    Quarters.ThirdQuarter,
                    Quarters.FourthQuarter
                },
                new string[]
                {
                    FTSIBIRCustomizations.Messages.FirstQuarter,
                    FTSIBIRCustomizations.Messages.SecondQuarter,
                    FTSIBIRCustomizations.Messages.ThirdQuarter,
                    FTSIBIRCustomizations.Messages.FourthQuarter
                })]

        public int? UsrQuarter { get; set; }
        public abstract class usrQuarter : PX.Data.BQL.BqlString.Field<usrQuarter> { }
        #endregion
    }
}

I found out that MasterFinPeriod is PXProjection of FinPeriod but still did not figured out how to make it work. 
 

Can some help me solve my problem? Thank you.