> For the complete documentation index, see [llms.txt](https://janelia-flyem.gitbook.io/neutu/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://janelia-flyem.gitbook.io/neutu/body-proofreading/intro-to-locking-bodies.md). # Body Lock {% hint style="info" %} This function needs the [Librarian](https://github.com/janelia-flyem/librarian) service to work. {% endhint %} Users can collaborate by simultaneously editing the database instead of working separately. Although this strategy saves time, conflicts may occur when two or more users try to edit the same body. To manage this conflict, NeuTu “locks” bodies under certain circumstances, so only one user can make and save changes to the body at a time. Once the changes are uploaded to the server, the body is automatically unlocked and another user can edit it! When changes are saved to the server, any updates from other users are automatically refreshed. If a user tries to work on a locked body, NeuTu issues a warning and the user can not work on the body until it is unlocked. ![Warning message for trying to split a locked body](/files/-LzEUDq8VyXqiM7ldPlP) NeuTu locks a body whenever the user makes changes to body by merging or splitting. NeuTu does not lock bodies that have been selected for viewing, so multiple users can view the same body at the same time! --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## 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, and the optional `goal` query parameter: ``` GET https://janelia-flyem.gitbook.io/neutu/body-proofreading/intro-to-locking-bodies.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. 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.