Receiving PXLockException When Updating Payment Prior to Capture

Hello,

I am trying to update the AR Payment when the capture button is clicked, prior to capturing. I need to add Entry Charges programmatically and then let the capture do the rest of its base processing. I have the below code but during the Save, I am receiving a PXLockException error, and a message that another process has updated the ARRegister. Can you please provide guidance on how I can properly update the record prior to the base method and let basemethod do its process based on the updated record?

public class ARPaymentEntry_PaymentTransactionExt : PXGraphExtension<ARPaymentEntryPaymentTransaction, ARPaymentEntry>
    {
        public static bool IsActive() => PXAccess.FeatureInstalled<PX.Objects.CS.FeaturesSet.integratedCardProcessing>();
        public override void Initialize() => base.Initialize();
        public delegate IEnumerable CaptureCCPaymentDelegate(PXAdapter adapter);

 [PXOverride]
        public virtual IEnumerable CaptureCCPayment(PXAdapter adapter, CaptureCCPaymentDelegate baseDelegate)
        {
            Base.Save.Press();
            //List<ARRegister> ret = new List<ARRegister>();

            foreach (ARPayment ardoc in adapter.Get<ARPayment>())
            {               

                var ext = ardoc.GetExtension<BMEPARRegisterExt>();
ARPayment payment = Base.Document.Current;
                ARPaymentChargeTran Charge = new ARPaymentChargeTran
                {
                    DocType = payment.DocType,
                    RefNbr = payment.RefNbr,
                    EntryTypeID = "TEST",
                    CuryTranAmt = 20.00m
                };


                Base.PaymentCharges.Insert(Charge);
                Base.Document.Update(payment);
                Base.Persist();
            }

            var ret = baseDelegate?.Invoke(adapter);         

            return ret;
        }

}