# Invoice Items / Update existing invoice Items

> When updating an Invoice Item, the Keys are relative to the internal ID's and not the contextual Invoice ID. (Invoices, Payments and Credit Notes)

- Page: https://dashboard.nizu.io/knowledge_base/view/191-invoice-items-update-existing-invoice-items
- Part of: [Knowledge base](https://dashboard.nizu.io/knowledge_base/llms.txt) on NIZU — https://dashboard.nizu.io/llms.txt
- Updated: 2026-10-25T11:50:03Z

When updating an Invoice Item, the Keys are relative to the internal ID's and not the contextual Invoice ID.