Doc.save() Creating new records not updating existing records

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Existing value update for check your topic.

Updating field value based on another doctype field value,

Hi @ibalajib, If not work then try this, please. It’s working on my side. So apply and check it. Document Type: Holiday List DocType Event: After Save test_name = frappe.db.get_value("Custom DocType",{'working_id':doc.name}, 'name'); if test_name: test_doc = frappe.get_doc("Custom DocType",test_name) holidays = frappe.utils.date_diff(doc.to_date, doc.from_date) final_holidays = holidays - doc.total_holidays + 1; test_doc.duration = final_holidays; test_doc.number_of_l…

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