I currently have an Ancestral Guardian barbarian 8 / Battle Master fighter 3. Some of the maneuvers I selected earlier in this character's career aren't working out as well in Tier 3. Battle Master provides one option for swapping them out (PHB, p. 73):
Maneuvers. You learn three maneuvers of your choice [...]
You learn two additional maneuvers of your choice at 7th, 10th, and 15th level. Each time you learn new maneuvers, you can also replace one maneuver you know with a different one.
Unfortunately, that would require me to take 4 more levels of fighter, including a dead level at fighter 5. I do not want to advance beyond level 4 in fighter; taking barbarian all the way to level 17 would be even better. Is there a way to swap out maneuvers without taking fighter to level 7?