Analyse following RPM build log snippet. Describe contents accurately, without speculation or suggestions for resolution.            
Your analysis must be as concise as possible, while keeping relevant information intact.
Snippet: 
Error: Transaction test error:
  file /etc/dnf/dnf.conf from install of libdnf5-5.1.12-1.fc40.x86_64 conflicts with file from package dnf-data-4.19.0-1.fc40.noarch
Transaction test fails, because the dnf5 package from the dnf5-testing repository provides /etc/dnf/dnf.conf which is also provided by the dnf package that is already installed.