--- title: "Unable to Create a Purchase Order Due to Negative Quantity Error" slug: "unable-to-create-po-due-to-negative-quantity-error" updated: 2026-10-15T00:51:02Z published: 2026-10-15T00:51:02Z canonical: "help.servicetitan.com/unable-to-create-po-due-to-negative-quantity-error" --- > ## Documentation Index > Fetch the complete documentation index at: https://help.servicetitan.com/llms.txt > Use this file to discover all available pages before exploring further. # Unable to Create a Purchase Order Due to Negative Quantity Error ## Problem When trying to create a purchase order for a specific item, you receive an error message stating that it will cause a negative quantity in the inventory location. ## Solution Google Chrome uses something called a "cache" to make pages load more quickly. This works by saving pages you access frequently so that your computer doesn't have to download them every time you visit a specific website. Although this will usually make your ServiceTitan experience better, if you're experiencing any trouble, clearing your cache is a good place to start because it forces your computer to re-download your frequently accessed page resources. To do this, go to **Chrome > More > More tools > Clear browsing data**. Next, select the top 4 checkboxes. This won't delete any of your saved passwords. By following these steps, you should be able to create a purchase order without encountering the negative quantity error. If you have any other questions or issues, please feel free to contact ServiceTitan.