PXselector Is Not taking Manually entered values

Hi Everyone 

I think it’s Known issue to you guys

As shown in the screen shot I Need to Insert data as Remotely

• (Tables are Different)

This is Section Id (DAC) :

 #region SectionID
        [PXDBInt(IsKey = true)]
        [PXDefault()]
        [PXUIField(DisplayName = "Section ID", Required = true)]
        [PXSelector(typeof(Search<SSPAgreeSection.sectionID>),
            typeof(SSPAgreeSection.sectionCode),
            typeof(SSPAgreeSection.descr),
            SubstituteKey = typeof(SSPAgreeSection.sectionCode),
            DescriptionField = typeof(SSPAgreeSection.descr))]
        
        public virtual int? SectionID { get; set; }
        public abstract class sectionID : PX.Data.BQL.BqlInt.Field<sectionID> { }