For example, 'buffer' source by default has group_index = 2 [1], however if we take all the sources plus crates and run them through cmp.config.sources() again, since it's a one-dimensional list, all group_indexes will be reset to 1. [1] https://github.com/LazyVim/LazyVim/blob/879e29504d43e9f178d967ecc34d482f902e5a91/lua/lazyvim/plugins/coding.lua#L74-L80