Hi @jinsy,
Please check it.
frappe.ui.form.on('Lead', {
company(frm) {
if (frm.doc.company == "Company 1") {
frm.doc.naming_series = "CF-DXB-.YYYY.-";
}
else {
frm.doc.naming_series = "CF-EKM-.YYYY.-";
}
}
});
Thank You!