> For the complete documentation index, see [llms.txt](https://docs.d5render.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.d5render.com/instruction-for-d5-for-teams/how-to-use-multi-editing/faqs.md).

# FAQs

#### Why can't I open a multi-editor project created in a previous version after a version upgrade?

Due to the version management mechanism of multi-editor projects, a multi-editor project can only be opened in the current version.

* If you need to open a multi-editor project created in a lower version in a higher version of D5, you must **first open the central file in the higher version and save it**, then you can normally load the workset.
* If you load the workset directly without saving the central file first, it will prompt "This project only supports opening in x.x version client."

{% hint style="info" %}
**Note:** After saving in the higher version, the project will only be openable in the higher version client. Please confirm that all team members have upgraded before proceeding.
{% endhint %}

#### What should I do if the central file is occupied in a multi-editor project?

When the central file is open, other members cannot enter the central file for management operations. If an abnormal occupancy occurs, please contact the team administrator to execute **"Forced quit of editing status"**.