Street Twin Oil Weep

Hi - have a bit of an oil weep on Street Twin 900 (2018 model). It is on the near side of the bike in the area behind the clutch cable adjustment clamp on the lower side cover. The oil is weeping out of what appears to be a blanking plug, perhaps the plug is to blank off a hole required for the manufacturing process of the crankcase. I have attached a photo of the “plug” which has a 8 mm Allen socket head. I have tried to turn this, initially trying to loosen it to gauge how tight the plug is and found it to be extremely tight. I’m being ultra cautious in case I were to strip the crankcase thread. If it had been loose, I would have attempted to nip it up as an interim measure and then next time I change the oil, I would remove the plug and put thread seal on it and reinsert. Just wondering if anyone has had similar issue and how they went about curing it. Thanks