Is this a parasite?

this is simply a normal shoot, in soil it's always a good sign. Some plants actually help the cannabis by creating N or P or whatever. So actually if you like RQS, you should check them because they supply "companion plants" . It can be a whole technique for nutrients if you're careful ! Anyway nothing to worry about, it wont harm the plant, just rip it out . Hope this helps ! 🚀