Steps to reproduce:

1. Obtain 3 enchanted books: 1 with Sharpness, 1 with Density and 1 with Breach
2. Switch to Survival mode if not in it already
3. Attempt to combine the books with Sharpness and Density using an anvil
4. Attempt to combine the books with Sharpness and Breach using an anvil

Observed result:
You can't combine Sharpness with Density or Breach, despite the fact that you cannot enchant any weapon that supports Sharpness with Breach and Density and vice versa.

Expected result:
You can combine Sharpness with Density or Breach.