Code
T0007 version-gone
The version that a page names can no longer be loaded. A caller gets it with the status 409.
Details
A call may name the version its page was built from, in "version" of its body. While that version can be loaded the call is served by it. After that the answer is this code, and holds running, the id of the version that is running now. A watch of the live connection names the version of its page the same way, and is answered failed with this code for one that can no longer be loaded (topic.live.connection).
The fix
Nothing for the builder to do: the page follows the running version by itself. A program that names a version reads running from the answer and names that one.