How to change default mappings

[thomasrebele]

I start vim-taskwarrior with the following commands:

TW

nnoremap <buffer> s :
nnoremap <buffer> n gk
nnoremap <buffer> r gj

Afterwards I can move lines up and down with n and r.
However, after syncing by pressing S, only n works as expected; r was reset to change report type

How can I change the mappings for vim-taskwarrior permanently?