Basically, I installed n(tj/n)for managing my node versions, and after that I installed a node version 14.6, it automatically switched my node version to 14.6 and also try to switch my version using n command but that shows only the one that I installed with n.
So, is there any way to switch to my main node version (that's installed previously) ??
I don't know if n preserves your current node version, but if you know your previous version e.g. 12.13.0 just type
n 12.13.0
It will install and switch to 12.13.0. After the installation you can switch versions just running n.