linux - Skipping acquire of configured file 'main/binary-i386/Packages'
Good afternoon, please tell me what I'm doing wrong. I just installed the Linux Ubuntu on my computer and still don’t understand anything about it. I tried to install PostreSQL and pgAdmin. I installed on this video tutorial https://www.youtube.com/watch?v=Vdzb7JTPnGk I get this error.

You must change the line of /etc/apt/sources.list.d/pgdg.list to 
deb [arch=amd64] http://apt.postgresql.org/pub/repos/apt/ focal-pgdg main

