Seefu that makes out point very well. Per this chart below it’s impossible to have free nitrites for 60 days, so we know your tester is off as linked in that thread above, this is common. Your nitrites are zero, but indicating still there if you used Prime at any step then it causes nitrite misreads. High nitrates can also misread as nitrite, it’s a mess trying to factor anything beyond ammonia in tank cycling.