PostgreSQL Package conflicts on Fedora 40

Hi all;

I recently did a clean install of Fedora 40 on a new laptop. Then I
installed PostgreSQL like this:

In the download form at:
https://www.postgresql.org/download/linux/redhat/

I selected PostgreSQL 16 and the Platform as Fedora 40

As root I ran this:

dnf install -y
https://download.postgresql.org/pub/repos/yum/reporpms/F-40-x86_64/pgdg-fedora-repo-latest.noarch.rpm

Then I ran these install commands ( I want multiple versions - as a
PostgreSQL consultant I need to test scripts and code on the version my
clients are running):

dnf install -y  postgresql12   postgresql12-server postgresql12-contrib

dnf install -y  postgresql13   postgresql13-server postgresql13-contrib

dnf install -y  postgresql14   postgresql14-server postgresql14-contrib

dnf install -y  postgresql15   postgresql15-server postgresql15-contrib

dnf install -y  postgresql16   postgresql16-server postgresql16-contrib

Now when I run dnf update as root I get these conflict errors, any help
would be greatly appreciated.

 Problem 1: package postgresql15-15.8-1.fc40.x86_64 from updates
conflicts with postgresql provided by
postgresql12-12.20-2PGDG.f40.x86_64 from @System
  - cannot install the best update candidate for package
postgresql15-15.8-1PGDG.f40.x86_64
  - cannot install the best update candidate for package
postgresql12-12.20-2PGDG.f40.x86_64
 Problem 2: package postgresql15-contrib-15.8-1.fc40.x86_64 from
updates conflicts with postgresql-contrib provided by
postgresql12-contrib-12.20-2PGDG.f40.x86_64 from @System
  - cannot install the best update candidate for package
postgresql15-contrib-15.8-1PGDG.f40.x86_64
  - cannot install the best update candidate for package
postgresql12-contrib-12.20-2PGDG.f40.x86_64
 Problem 3: package postgresql15-server-15.8-1.fc40.x86_64 from updates
conflicts with postgresql-server provided by
postgresql12-server-12.20-2PGDG.f40.x86_64 from @System
  - cannot install the best update candidate for package
postgresql15-server-15.8-1PGDG.f40.x86_64
  - cannot install the best update candidate for package
postgresql12-server-12.20-2PGDG.f40.x86_64

Thanks in advance