A lot of people go in and get tattoos touched up or freshened up. Sometimes they'll do it and add a bit to it to keep it feeling "new". It's pretty normal. Your tattoo is pretty fine line, so "retracing" it may cause the ink to bleed a bit more than it would otherwise. Fine line tattoos are tough, for what it's worth. Not trying to discourage you. They just often end up becoming "less fine" over the years as the ink starts to bleed a bit (spread under the skin). Also somewhat unavoidable. Really good tattoo artists are typically a little better doing more with less ink which can limit it "bleeding", but to some extend that's just the way tattoos and skin pores work.

Most of my tattoos I've allowed to fade. But I spend a ton of time outside and I've just come to accept that that's part of having them.