I’ve a field at Lead table named Product (crf2e_service) , And at product table there are 3 bool fields named Individual, Private, Governorate,

Contact is individual, and Account contain a classification field (Private, or Governorate)

At Creating lead i want when user choose Existing contact filter product according to individual type only, and when user choose account filter according to classification

The JS code i write works only at the first time i choose contact or account, when i remove or choose another type not clearing filter or change it

I but onload method at Form OnLoad Event Handler
And applyProductFilter at Existing Contact, And Existing Account OnChange Event Handler

var isProductFilterApplied = false;

function onLoad(executionContext) {
    var formContext = executionContext.getFormContext();
    var formType = formContext.ui.getFormType();

    if (formType !== 1) return; // Only apply for new records

    console.log("onLoad executed, form type: " + formType);

    // Add OnChange event handlers for parentcontactid and parentaccountid
    var parentContactField = formContext.getAttribute("parentcontactid");
    var parentAccountField = formContext.getAttribute("parentaccountid");

    if (parentContactField) {
        parentContactField.addOnChange(function(context) {
            applyProductFilter(context);
        });
    }

    if (parentAccountField) {
        parentAccountField.addOnChange(function(context) {
            applyProductFilter(context);
        });
    }

    // Apply filter on load
    applyProductFilter(executionContext);
}

function applyProductFilter(executionContext) {
    var formContext = executionContext.getFormContext();

    var parentContactField = formContext.getAttribute("parentcontactid");
    var parentAccountField = formContext.getAttribute("parentaccountid");

    var parentContact = parentContactField ? parentContactField.getValue() : null;
    var parentAccount = parentAccountField ? parentAccountField.getValue() : null;

    console.log("applyProductFilter executed");

    clearProductFilter(formContext);

    if (parentAccount) {
        var accountId = parentAccount[0].id.replace('{', '').replace('}', '');
        console.log("Parent Account ID: " + accountId);
        filterProductsByAccount(formContext, accountId);
    } else if (parentContact) {
        var contactId = parentContact[0].id.replace('{', '').replace('}', '');
        console.log("Parent Contact ID: " + contactId);
        filterProductsByContact(formContext, contactId);
    } else {
        console.log("No parent contact or account selected");
    }
}

function clearProductFilter(formContext) {
    var productField = formContext.getControl("crf2e_service");

    if (productField) {
        console.log("Clearing product filter");
        productField.removePreSearch(productFilterHandler);
        productField.addPreSearch(function () {
            productField.addCustomFilter("<filter type='and'></filter>");
        });
        isProductFilterApplied = false;
    }
}

function productFilterHandler() {
    // Dummy function to use as a reference for adding/removing the handler
}

function filterProductsByContact(formContext, contactId) {
    Xrm.WebApi.retrieveRecord("contact", contactId, "?$select=contactid").then(
        function success(result) {
            console.log("filterProductsByContact executed");
            var filter = "<filter type='and'><condition attribute='crf2e_isindividual' operator='eq' value='true' /></filter>";
            applyProductLookupFilter(formContext, filter);
        },
        function (error) {
            console.log("Error retrieving contact: " + error.message);
        }
    );
}

function filterProductsByAccount(formContext, accountId) {
    Xrm.WebApi.retrieveRecord("account", accountId, "?$select=ownershipcode").then(
        function success(result) {
            console.log("filterProductsByAccount executed");
            var classification = result.ownershipcode;
            var filter = "";

            if (classification === 2) { // Assuming 2 is the value for Private
                filter = "<filter type='and'><condition attribute='crf2e_isprivate' operator='eq' value='true' /></filter>";
            } else if (classification === 1) { // Assuming 1 is the value for Government
                filter = "<filter type='and'><condition attribute='crf2e_isgovernment' operator='eq' value='true' /></filter>";
            }

            applyProductLookupFilter(formContext, filter);
        },
        function (error) {
            console.log("Error retrieving account: " + error.message);
        }
    );
}

function applyProductLookupFilter(formContext, filter) {
    var productField = formContext.getControl("crf2e_service");

    if (productField) {
        console.log("Applying product lookup filter: " + filter);
        productField.addPreSearch(function () {
            productField.addCustomFilter(filter);
        });

        isProductFilterApplied = true;
    }
}

At Creating lead i want when user choose Existing contact filter product according to individual type only, and when user choose account filter according to classification

The JS code i write works only at the first time i choose contact or account, when i remove or choose another type not clearing filter or change it