Lots of errors: slap_global_control: unrecognized control: 1.3.6.1.4.1.4203.666.5.16

YNH version: 11.0.9.14
Self-hosted Debian installation

I’ve noticed a slew of these errors for something called “slapd”. No idea what it is, but was wondering if this is a concern. Everything seems to be working fine, as far as I can tell.

Can someone assist in fixing the “unrecognized control” error flood? Thanks!

Logs: hastebin