--- description: Step 1) For changing an existing purchase order you can use transaction code ME22N (or ME22 - the old version). Immediately after executing transaction code, system will take you to the most re title: "ME22N Tcode in SAP: How to Change a Purchase Order" image: https://www.guru99.com/images/sap-me22n-change-a-purchase-order.png --- [Skip to content](#main) **⚑ Smart Summary** Change a Purchase Order in SAP using transaction ME22N. The transaction opens the most recently handled order, and any other document is reached through the Purchase Order menu path before edits are saved. - ✏️ **Core Transaction:** ME22N changes an order; ME22 is the older version kept only for compatibility. - πŸ•˜ **Default Document:** The transaction opens the last order created, changed, or displayed by that user. - πŸ”€ **Switching Orders:** Purchase Order β†’ Other Purchase Order opens any document by number. - βž• **Item Changes:** New items can be added and existing quantities or dates adjusted before saving. - πŸ‘οΈ **Display Mode:** ME23N shows the same screens read only, which is the safe way to verify a change. - πŸ“ **Change History:** Every edit is recorded against the document so the previous value stays auditable. Read More ![Change a purchase order in SAP using ME22N](https://www.guru99.com/images/sap-me22n-change-a-purchase-order.png) ## What Can Be Changed on a Purchase Order? A purchase order is a commitment to a supplier, so SAP allows edits but constrains them according to what has already happened to the document. Knowing the boundaries prevents a wasted trip into the transaction. | Field or action | Changeable? | Condition | | --- | --- | --- | | Order quantity | Yes | Cannot fall below the quantity already received or invoiced | | Delivery date | Yes | Freely editable while the item is open | | Net price and conditions | Yes | Blocked once an invoice has been posted against the item | | Add a new item | Yes | Allowed at any time while the order is open | | Delete an item | Conditional | Only if no goods receipt or invoice exists for that item | | Vendor | No | Vendor is a key field; a new order must be created instead | | Purchasing organisation and document type | No | Fixed at creation, they determine number range and processing | | Plant on an existing item | No | Delete the item and add a new one for the correct plant | Where a release strategy applies, changing a value that the strategy evaluates, typically the item value, resets the approval and the order must be released again before transmission. ## Steps to Change a Purchase Order In this tutorial, we will learn how to change a purchase order. **Step 1)** For changing an existing purchase order you can use transaction code **ME22N** (or **ME22** – the old version). [![Change a Purchase Order in SAP ME22N]()](https://www.guru99.com/images/sap/2013/05/052013_1158_20Howtochan1.png) Immediately after executing transaction code, system will take you to the most recent purchase order you have created, changed or viewed. If you need to change some other purchase order, you can use the option which appears in the menu **Purchase order > Other Purchase Order**. [![Change a Purchase Order in SAP ME22N]()](https://www.guru99.com/images/sap/2013/05/052013_1158_20Howtochan2.png) **Step 2)** You will be presented a screen to enter the document you want to process. [![Change a Purchase Order in SAP ME22N]()](https://www.guru99.com/images/sap/2013/05/052013_1158_20Howtochan3.png) We can add another item and save our [purchase order](https://www.guru99.com/how-to-create-a-purchase-order.html). [![Change a Purchase Order in SAP ME22N]()](https://www.guru99.com/images/sap/2013/05/052013_1158_20Howtochan4.png) After saving we will be informed by the system that our PO is saved with changes. **πŸ’‘ Note:** Displaying of purchase orders can be reached through t-code **ME23N** (or **ME23** – old version). Everything looks and works the same as in change mode except that data isn’t changeable, you can only display it. **Don't Miss:** - [Material Master Views in SAP](https://www.guru99.com/material-master-views-ultimate-guide-2.html) - [ME49 in SAP: How to Compare Quotation Prices](https://www.guru99.com/how-to-compare-price-for-different-quotations.html) - [ME23N in SAP: Service PO (Purchase Order)](https://www.guru99.com/service-purchase-order.html) - [How to Post Goods Issue in SAP MM VL02N, VL09](https://www.guru99.com/how-to-issue-goods.html) ## Tracking Changes with the Change History Every saved edit is written to a change document, which is what makes a purchase order auditable months after the fact. Reaching that log takes two clicks and answers most disputes about who altered a price or a date. From inside ME22N or ME23N, open the menu path *Environment β†’ Header changes* for document level edits, or *Environment β†’ Item changes* with an item selected. The log lists the field changed, the old and new values, the user, and the timestamp. Three details are worth knowing: - **Header and item logs are separate.** A quantity change appears under item changes and will not be found in the header log. - **Only changes after the first save are recorded.** Values typed while the order was being created form the original document, not a change. - **Version management, where active, groups edits.** Each round of changes becomes a version that can be printed and re-transmitted to the vendor as an amendment. If the vendor already holds a printed copy, changing the order is only half the task. Output determination must resend the amended document, otherwise the supplier continues working from the superseded version. ## Common Errors When Changing a Purchase Order Most blocked edits produce a message that names the constraint rather than the cause. The table maps the frequent ones to their fix. | Situation | Why it happens | What to do | | --- | --- | --- | | Quantity cannot be reduced | Goods receipt already posted for more than the new figure | Reverse the goods receipt first, then reduce the order | | Price field is greyed out | An invoice has been posted against the item | Cancel the invoice, or correct the value with a credit memo | | Item cannot be deleted | Receipts or invoices exist for the item | Set the delivery completed indicator instead of deleting | | Order becomes unreleased after saving | A change altered a value the release strategy evaluates | Route the order through release again before transmission | | Document is locked by another user | The order is open in another session | Wait, or ask the named user shown in the message to exit | Where the underlying terms rather than a single order need correcting, update the [purchase info record](https://www.guru99.com/how-to-change-a-purchase-info-record.html) so future orders default correctly. Related steps are covered in [creating a purchase order with reference](https://www.guru99.com/how-to-create-purchase-order-with-reference.html) and across the [SAP MM tutorial](https://www.guru99.com/sap-mm-tutorial.html) series. ## FAQs 🚫 Can the vendor on a purchase order be changed? No. Vendor is a key field fixed at creation. Delete or close the existing order and create a new one for the correct supplier, referencing the same requisition if needed. πŸ“œ Where is the change history of a purchase order? Inside ME22N or ME23N choose Environment, then Header changes or Item changes. The log shows the field, old and new value, the user, and the date of every saved edit. πŸ€– How does AI reduce purchase order changes? AI validates quantity, price, and delivery date against historical patterns at creation time, catching the errors that would otherwise be corrected later through an amendment to the vendor. 🧠 Can AI predict which orders will need a date change? Yes. Models score open orders on vendor lead time performance and flag those likely to slip, letting buyers reschedule proactively rather than reacting to a missed delivery. πŸ“€ Does the vendor receive the change automatically? Only if output determination is configured to resend on change. Otherwise the amended order must be transmitted manually, or the supplier keeps working from the earlier version. #### Summarize this post with: ChatGPTPerplexityGrokGoogle AI **Stay Updated on AI** **Get Weekly AI Skills, Trends, Actionable Advice.** ##### Sign up for the newsletter Subscribe for Free You have successfully subscribed. Please check your inbox. ![AI-Newsletter]() Chosen by over **350,000+** professionals [Scroll to top](#wrapper) Γ— Search for: ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://www.guru99.com/#organization","name":"Guru99","sameAs":["https://www.facebook.com/Guru99Official","https://twitter.com/guru99com"],"logo":{"@type":"ImageObject","@id":"https://www.guru99.com/#logo","url":"https://www.guru99.com/images/guru99-logo-v1-150x59.png","contentUrl":"https://www.guru99.com/images/guru99-logo-v1-150x59.png","caption":"Guru99","inLanguage":"en-US"}},{"@type":"WebSite","@id":"https://www.guru99.com/#website","url":"https://www.guru99.com","name":"Guru99","publisher":{"@id":"https://www.guru99.com/#organization"},"inLanguage":"en-US"},{"@type":"ImageObject","@id":"https://www.guru99.com/images/sap-me22n-change-a-purchase-order.png","url":"https://www.guru99.com/images/sap-me22n-change-a-purchase-order.png","width":"700","height":"250","caption":"SAP ME22N - Change a Purchase Order","inLanguage":"en-US"},{"@type":"BreadcrumbList","@id":"https://www.guru99.com/how-to-change-a-purchase-order.html#breadcrumb","itemListElement":[{"@type":"ListItem","position":"1","item":{"@id":"https://www.guru99.com","name":"Home"}},{"@type":"ListItem","position":"2","item":{"@id":"https://www.guru99.com/sap-mm","name":"SAP - MM"}},{"@type":"ListItem","position":"3","item":{"@id":"https://www.guru99.com/how-to-change-a-purchase-order.html","name":"ME22N Tcode in SAP: How to Change a Purchase Order"}}]},{"@type":"WebPage","@id":"https://www.guru99.com/how-to-change-a-purchase-order.html#webpage","url":"https://www.guru99.com/how-to-change-a-purchase-order.html","name":"ME22N Tcode in SAP: How to Change a Purchase Order","dateModified":"2026-07-21T15:57:47+05:30","isPartOf":{"@id":"https://www.guru99.com/#website"},"primaryImageOfPage":{"@id":"https://www.guru99.com/images/sap-me22n-change-a-purchase-order.png"},"inLanguage":"en-US","breadcrumb":{"@id":"https://www.guru99.com/how-to-change-a-purchase-order.html#breadcrumb"}},{"@type":"Person","@id":"https://www.guru99.com/author/olivia","name":"Olivia Turner","description":"I'm Olivia Turner, an SAP MM, QM, PP, and PI/PO Consultant, specializing in optimizing SAP systems for manufacturing and quality management.","url":"https://www.guru99.com/author/olivia","image":{"@type":"ImageObject","@id":"https://www.guru99.com/images/olivia-turner-author-120x120.png","url":"https://www.guru99.com/images/olivia-turner-author-120x120.png","caption":"Olivia Turner","inLanguage":"en-US"},"worksFor":{"@id":"https://www.guru99.com/#organization"}},{"articleSection":"SAP - MM","headline":"ME22N Tcode in SAP: How to Change a Purchase Order","description":"Step 1) For changing an existing purchase order you can use transaction code ME22N (or ME22 - the old version). Immediately after executing transaction code, system will take you to the most re","keywords":"sap-mm, sap","speakable":{"@type":"SpeakableSpecification","cssSelector":[".entry-title",".summary"]},"@type":"Article","author":{"@id":"https://www.guru99.com/author/olivia","name":"Olivia Turner"},"dateModified":"2026-07-21T15:57:47+05:30","image":{"@id":"https://www.guru99.com/images/sap-me22n-change-a-purchase-order.png"},"copyrightYear":"2026","name":"ME22N Tcode in SAP: How to Change a Purchase Order","subjectOf":[{"@type":"FAQPage","mainEntity":[{"@type":"Question","name":"Can the vendor on a purchase order be changed?","acceptedAnswer":{"@type":"Answer","text":"No. Vendor is a key field fixed at creation. Delete or close the existing order and create a new one for the correct supplier, referencing the same requisition if needed."}},{"@type":"Question","name":"Where is the change history of a purchase order?","acceptedAnswer":{"@type":"Answer","text":"Inside ME22N or ME23N choose Environment, then Header changes or Item changes. The log shows the field, old and new value, the user, and the date of every saved edit."}},{"@type":"Question","name":"How does AI reduce purchase order changes?","acceptedAnswer":{"@type":"Answer","text":"AI validates quantity, price, and delivery date against historical patterns at creation time, catching the errors that would otherwise be corrected later through an amendment to the vendor."}},{"@type":"Question","name":"Can AI predict which orders will need a date change?","acceptedAnswer":{"@type":"Answer","text":"Yes. Models score open orders on vendor lead time performance and flag those likely to slip, letting buyers reschedule proactively rather than reacting to a missed delivery."}},{"@type":"Question","name":"Does the vendor receive the change automatically?","acceptedAnswer":{"@type":"Answer","text":"Only if output determination is configured to resend on change. Otherwise the amended order must be transmitted manually, or the supplier keeps working from the earlier version."}}]}],"@id":"https://www.guru99.com/how-to-change-a-purchase-order.html#schema-1147168","isPartOf":{"@id":"https://www.guru99.com/how-to-change-a-purchase-order.html#webpage"},"publisher":{"@id":"https://www.guru99.com/#organization"},"inLanguage":"en-US","mainEntityOfPage":{"@id":"https://www.guru99.com/how-to-change-a-purchase-order.html#webpage"}}]} ```