systemd-networkd 'policy rule' errors in journal

["Kevin P. Fleming" <kevin@xxxxxxx>]

On my two systems that are running systemd 249.5-1 (Debian sid
packages), I see this message in the journal once for each network
interface that systemd-networkd manages:

Could not drop routing policy rule: No such file or directory

I don't have any routing policies configured on the systems, so I
can't figure out what is causing this.