This invalid IP address is the result of an empty value or unknown target. It is not feasible for edits to come from this IP, but if there is, a bug is present in Wikimedia's servers and you should report it to the Wikimedia Phabricator.
If you are an admin who wishes to test blocking, please use 192.0.2.16 (talk · contribs · block log) for that instead.
For more information, please see 0.0.0.0.