Electric receptacle with reversed neutral/hot wire?

[Yoann Mamy Randriamihaja]

Hello!

I have a small electric question.

I used a GCFI receptacle tester on one receptacle that displays "hot/neut. reverse". I also checked it with a non-contact voltage tester and the larger blade hole (which should be neutral) appears to be hot.

So I opened the receptacle (after turning power off) but the white wire goes where the white label is on the receptacle and when I compare it to another working receptacle, it's wired the same.

So my guess is that neutral (white) and hot (black) wires are reversed at the power supply (electrical panel?). If so, how can I verify this on the electrical panel?

Is having neutral and hot reversed an issue?

Just found out another receptacle with same signal ("hot/neut. reverse") which I had been using for a while now without any visible issue.

Should I reverse the wiring at the receptacle (I guess preferably at the source)?

Thanks for your help!

Yoann