# Message is not valid for this bond {% hint style="danger" %} `Message is not valid for this bond` {% endhint %} This error occurs because the bond state for the transaction being sent is in a state which does not match the state specified on the message definition. Usually occurs when a bond has been closed and an external system attempts to send an update, which requires the bond to be open. Check the bond state against that of the message definition and decide whether the definition needs to be amended, or the sending system needs to change its ways. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.sharelogic.com/unifi/4.0/troubleshooting/integration-responses/message-is-not-valid-for-this-bond.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.