Issue updating a field in custom table

Good day,

I am having an issue updating a record in my custom table, I have a trigger in the INItemStats table, when the Maxcost changes the trigger adds a record to the custom table, these records are used in my processing screen only if their status is 0, after processing and doing the expected action I want to change the status of the record to 1, but Every attempt I do it gives me the same error, “Another process has updated EVTCMaxcost your changes will be lost”. And in the code is PX.Data.LockViolationException.

I have changed the code multiple times to update, to save in the database and cleared the cache, but always get the same error. (I can’t use this. right now, because of the modification  made and the method being static. )

Cache.Persist(PXDBOperation.Update);

this.ProcessView.Cache.Update(item);

this.ProcessView.Cache.PersistUpdated(item);

this.ProcessView.Cache.Persist(PXDBOperation.Update);

this.ProcessView.Cache.Clear();

this.Actions.PressSave();

this.Persist();

public class EVTCUpdateCostProcess : PXGraph<EVTCUpdateCostProcess>
    {

        public PXProcessing<EVTCMaxCost, Where<EVTCMaxCost.status, Equal<Zero>>> ProcessView;
        public PXCancel<EVTCMaxCost> Cancel;

        [InjectDependency]
        public static RequestService _srvc { get; } = new APILogin();

        public EVTCUpdateCostProcess()
        {
            var cache = this.Caches[typeof(EVTCMaxCost)];
            ProcessView.SetProcessCaption("Process");
            ProcessView.SetProcessAllCaption("Process All");


            ProcessView.SetProcessDelegate(delegate (List<EVTCMaxCost> costrecord)
            {
                ExecuteProcess(costrecord, cache);
            });

        }


        public static void ExecuteProcess(List<EVTCMaxCost> costrecord, PXCache Cache)
        {
            foreach (var item in costrecord)
            {

                string respxml = _srvc.GetItemIncludeCostQueryRequest(item.InventoryCD);

                XmlSerializer _serializer = new XmlSerializer(typeof(WebcreteXML));
                TextReader reader = new StringReader(respxml);
                WebcreteXML rec = (WebcreteXML)_serializer.Deserialize(reader);
                reader.Close();

                if (rec.WebcreteXMLMsgsRs.ItemQueryRs.ItemRet != null)
                {


                    var itemRet = rec.WebcreteXMLMsgsRs.ItemQueryRs.ItemRet;
                    string code = itemRet.Code;
                    string StandardCost = item.MaxCost.ToString();

                    _srvc.GetItemUpdateRequest(code, StandardCost);


                    if (item != null)
                    {
                        // Check if the status is already 1 (processed)
                        if (item.Status != 1)
                        {

                            // Update the status
                            item.Status = 1;

                            Cache.Update(item);
                        }


                    }
                    else
                    {
                        continue;
                    }
                }
            }
            Cache.Persist(PXDBOperation.Update);

        }


    }