I'm splitting this from https://github.com/backdrop/backdrop-issues/issues/4055 as this is a new feature, so we may want to push to a minor release (I personally have no opinion on that).
This is the respective of Issue #1335424: Title as a select, which was introduced in the 7.x version of the Link module with https://git.drupalcode.org/project/link/commit/0235032
As the "static" Title, I'm proposing a title where the user can select the value from a select dropdown. This is useful when admins want to limit the Title to several values. Eg. Home, Office, School, Other.
Admin form for field:

Entity field widget:

Recent comments
Thanks, the /tmp folder was the problem. I moved it elsewhere and then the updated worked. Thanks again!
Update 1.35.1 appears to install but hasn't
Probably not the reason, but worth to do a quick check: Sometimes the update cache interferes, so if something's odd with updates - some module (or core) claims to have updated, but then...
Update 1.35.1 appears to install but hasn't
Nope, not touched any permissions!
Update 1.35.1 appears to install but hasn't