If fixing this is an advanced technique I could put it off until I have more experience. I suspect that the knife is worth less than what it would cost to have a pro work on it.
Here are pictures of two knives of mine that seem to have this problem. The black handles knife is a Tramontia. The brown handled knife is a Mundial.
Thanks for the pix. A classic recurve belly after finger guard + steeling. Quite easy fix.
I've done a lot of these (just like lots of us here), and my advice is to also take the belly portio back by the same amoun as you need to get the finger guard to meet up with the bevel. In other words, if you have to remove 3mm of height from the guard, do the same to the rest of the edge.
I agree with lefty. If you don't bring down the belly, you risk loosing your flat spot at the heel and having it curve upwards. Mistake I've made the first few times.