bug.owner_link and bug_task.owner_link are marked as writable in the +apidoc although they are not

[Markus Korn]

In the sections "bug" and "bug_task" on https://edge.launchpad.net/+apidoc/ there are listed two a key called "owner_link" which is writable according to the value column.

Trying to change the value has no effect:
>>> b = launchpad.bugs[123456]
>>> b.bug_tasks[0].owner
<person at https://api.staging.launchpad.net/beta/~hobbsee>
>>> b.bug_tasks[0].owner = launchpad.me
>>> b.lp_save()
>>> b.bug_tasks[0].owner
<person at https://api.staging.launchpad.net/beta/~hobbsee>

This "owner_link" is equal to the web UIs "Filed here by...", I don't see why this value should be changeable at all.

Markus