Hi guys, I have a question for whom is more experienced than I am with this kind of instrument
My bass has a "buzz" (it's more like a "meow" sound to be accurate

) on the 8th fret, only on the E string (tuned in D, 110 gauge)
I already rised the action a bit, it has completely eliminated the buzz on the frets under the 8th but I still have problems on that exact point
If the bass had a truss rod I would try to loosen it a bit, but I can't
Can it be the problem is the fret itself? Maybe too worn out and I have to replace it?
I never went to a luthier before (I always made the setup myself) but now I haven't find a solution to this little (but annoying

) problem, I'd like to ask for possible solutions before I spend money on that