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 libdnf5-5.2.8.1-1.fc42.s390x conflicts with file from package dnf-data-4.22.0-1.fc40.noarch

File from one of the installed packages conflicts with file already present on the build system.