---
title: "What caused the only purchase order added to the invoice to be numbered 002 instead of 001?"
slug: "what-caused-only-purchase-order-added-to-invoice-numbered-002-instead-001"
updated: 2026-10-16T00:23:18Z
published: 2026-10-16T00:23:18Z
canonical: "help.servicetitan.com/what-caused-only-purchase-order-added-to-invoice-numbered-002-instead-001"
---

> ## Documentation Index
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# What caused the only purchase order added to the invoice to be numbered 002 instead of 001?

## Problem

The only purchase order added to an invoice was numbered as "002". This happened because another user was creating purchase order "001" at the same time.

## Solution

Purchase order numbering discrepancies occur when multiple users create or cancel purchase orders simultaneously.

### Resolving Discrepancies in Purchase Order Numbering

1. Check if another user is creating a purchase order.
2. Ask your manager if they were adding a purchase order at the same time.
3. Confirm if the manager had the purchase order screen open.
4. Understand that if a purchase order is being created by someone else, your purchase order will get the next available number.
5. If a purchase order number seems incorrect, check with your team to see if there was a purchase order being created or canceled at the same time.