Random 404 errors with hyphen and forward slashes

One of the WP sites logs multiple 404 errors for urls structured like:

domain.com/-/-/-/-/-/-/-/-/-/-/

Access via Chrome and Firefox user device.
Always with 10 dashes and 11 slashes.

Is that a bot action scanning directories? Is it worth setting a redirect?
Should I take any actions to mitigate it?

 

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