How to tag road that does not exist anymore to prevent someone from tracing it again with older imagery

use-case: a section of a major road has become recently obsolete most likely due to a landslide and a new section has been built to replace it:

The old section is still visible on all imagery, while the new one is not.
If you remove the old section, someone else may add it again using imagery

What valid/documented tag should be used instead to mark the old section taking into account rendering/routing support?

abandoned:highway=secondary + smoothness=impassable ?

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