How to not show certain keybindings ever

[Mikkolehtimaki]

I have a mapping for easy navigation like this:

for i = 1, 9 do
    local lhs = string.format("<Leader>%d", i)
    local rhs = string.format(":%dwincmd w<CR>", i)
    vim.api.nvim_set_keymap('n', lhs, rhs, {noremap = true, silent = true, desc = '{}'})
end

Unfortunately this makes whichkey show me these 9 mappings after pressing the leader key. I couldn't figure a way to disable this behavior. Any ideas? Thanks!