apt error: repository doesn't support architecture 'i386'

When I run sudo apt update got this message:

N: Skipping acquire of configured file 'main/binary-i386/Packages' as repository 'http://apt.postgresql.org/pub/repos/apt hirsute-pgdg InRelease' doesn't support architecture 'i386'

this is output of dpkg --get-selections | awk '/i386/{print $1}'

gcc-11-base:i386
libc6:i386
libcap2:i386
libcom-err2:i386
libcrypt1:i386
libdbus-1-3:i386
libgamemode0:i386
libgamemodeauto0:i386
libgcc-s1:i386
libgcrypt20:i386
libgpg-error0:i386
libgssapi-krb5-2:i386
libidn2-0:i386
libk5crypto3:i386
libkeyutils1:i386
libkrb5-3:i386
libkrb5support0:i386
liblz4-1:i386
liblzma5:i386
libnsl2:i386
libnss-nis:i386
libnss-nisplus:i386
libssl1.1:i386
libsystemd0:i386
libtirpc3:i386
libunistring2:i386
libzstd1:i386

checked this directory /etc/apt/sources.list.d, but there is nothing about postgres to change it from something like this : REPOCONFIG="deb http://dl.google.com/linux/earth/deb/ stable main" to : REPOCONFIG="deb [arch=amd64] http://dl.google.com/linux/earth/deb/ stable main"

output of rep -r postgresql /etc/apt --include=*.list :

/etc/apt/sources.list.d/pgdg.list:deb http://apt.postgresql.org/pub/repos/apt hirsute-pgdg main

You have to edit the /etc/apt/sources.list.d/pgdg.list file to change

deb http://apt.postgresql.org/pub/repos/apt hirsute-pgdg main

to

deb [arch=amd64] http://apt.postgresql.org/pub/repos/apt hirsute-pgdg main

by sudo nano /etc/apt/sources.list.d/pgdg.list, Ctrl+o, Ctrl+x.

Then update package lists by sudo apt-get update and so on.