ZAM has Dated Goshenite Rings down as L42
Then ZAM is wrong. While several recipes (mostly related to raw materials) were lowered in difficulty, the GSM recipes were not adjusted in levels in 1.19 at all.
If you looked at YG, the levels are correctly listed as 49.

And you could have inferred the levels from the exp you're getting as well. You should have gotten around about 650 exp on the ones you succeeded on. Base 250 at same level + 50 per additional level.

I would be intrigued to see the 'official' confirmation that the rings are magic craftsmanship-orientated but I will try that and thanks for the suggestion.
Just do it once and you'll confirm it yourself. Folks nowadays just seems so lazy to me when they want "official" confirmation on everything.

Good luck getting into an Ifrit party without Sentinel
Already cleared it once. I have a good LS...haha