Unrecognized key error when putting to DHT

I’m trying to put a record in the DHT, but it’s throwing an error that I can’t seem to identify the origin of.

When I try to put the key /custom-prefix/something and corresponding data into the DHT, it complains that it’s an Unrecognized key prefix, however, when I look through the codebase I can’t seem to find what’s causing that or what I need to do to give it a recognized prefix.

Is there something I need to do to give it a recognized prefix?

Edit: Looks like it was just because I had a / at the beginning. Not sure if that’s a consistent ux though because interface-datastore shows including / at the beginning. Might just be helpful to clarify it in the DHT docs.