Deleted additional keybinds are not deleted

[EssentialBlue]

When I delete additional keybind then they working, but they were deleted.

I tested it with amecs api and without amecs api

[EssentialBlue]

1.19.2 version of minecraft

[JustLetterV]

I can reproduce this in Minecraft 1.19.3 with NMUK 1.1.0.
Steps to reproduce:

1. Add additional keybinding
2. Test if it works
3. Remove additional keybinding you just added
4. Repeat the second step. Additional keybinding still works but doesn't appear in the key binds menu.