"python3-(pysnmp|smi)lextudio" rpms are a replacement of older "python3(pysnmp|smi)" and thus "dnf" shall be capable to update or replace them without any issue if the older packages are alreday installed. This is not possible due to defined "Conflicts".

https://git.centos.org/rpms/pysnmp-lextudio/blob/c9s-sig-cloud-openstack-caracal/f/SPECS/pysnmp-lextudio.spec#_36

https://git.centos.org/rpms/python-smi-lextudio/blob/c9s-sig-cloud-openstack-caracal/f/SPECS/python-smi-lextudio.spec#_29

Can you please change "Conflicts" by "Obsoletes" in the SPEC of new (lextudio) rpm packages? The "dnf install" and or "dnf update" will be capable to replace older versions of the python libraries packages properly by new ones.