Description of problem:

Version-Release number of selected component (if applicable): 2.3.3-2

How reproducible:

$ dnf update
...
Error: 
 Problem 1: package avahi-devel-0.7-19.el8.x86_64 requires avahi(x86-64) = 0.7-19.el8, but none of the providers can be installed
  - cannot install both avahi-0.7-20.el8.x86_64 and avahi-0.7-19.el8.x86_64
  - cannot install the best update candidate for package avahi-devel-0.7-19.el8.x86_64
  - cannot install the best update candidate for package avahi-0.7-19.el8.x86_64
 Problem 2: package avahi-compat-libdns_sd-0.7-19.el8.x86_64 requires avahi-libs(x86-64) = 0.7-19.el8, but none of the providers can be installed
  - cannot install both avahi-libs-0.7-20.el8.x86_64 and avahi-libs-0.7-19.el8.x86_64
  - cannot install the best update candidate for package avahi-libs-0.7-19.el8.x86_64
  - cannot install the best update candidate for package avahi-compat-libdns_sd-0.7-19.el8.x86_64
 Problem 3: package avahi-compat-libdns_sd-devel-0.7-19.el8.x86_64 requires avahi-devel(x86-64) = 0.7-19.el8, but none of the providers can be installed
  - package avahi-devel-0.7-19.el8.x86_64 requires avahi-libs(x86-64) = 0.7-19.el8, but none of the providers can be installed
  - cannot install both avahi-libs-0.7-20.el8.x86_64 and avahi-libs-0.7-19.el8.x86_64
  - package avahi-glib-0.7-20.el8.x86_64 requires avahi-libs(x86-64) = 0.7-20.el8, but none of the providers can be installed
  - cannot install the best update candidate for package avahi-glib-0.7-19.el8.x86_64
  - cannot install the best update candidate for package avahi-compat-libdns_sd-devel-0.7-19.el8.x86_64
 Problem 4: problem with installed package avahi-devel-0.7-19.el8.x86_64
  - package avahi-devel-0.7-19.el8.x86_64 requires avahi-libs(x86-64) = 0.7-19.el8, but none of the providers can be installed
  - cannot install both avahi-libs-0.7-20.el8.x86_64 and avahi-libs-0.7-19.el8.x86_64
  - package avahi-gobject-0.7-20.el8.x86_64 requires avahi-libs(x86-64) = 0.7-20.el8, but none of the providers can be installed
  - cannot install the best update candidate for package avahi-gobject-0.7-19.el8.x86_64
 Problem 5: package barrier-2.3.3-2.el8.x86_64 requires libdns_sd.so.1()(64bit), but none of the providers can be installed
  - package avahi-compat-libdns_sd-0.7-19.el8.x86_64 requires avahi-libs(x86-64) = 0.7-19.el8, but none of the providers can be installed
  - cannot install both avahi-libs-0.7-20.el8.x86_64 and avahi-libs-0.7-19.el8.x86_64
  - package avahi-ui-gtk3-0.7-20.el8.x86_64 requires avahi-libs(x86-64) = 0.7-20.el8, but none of the providers can be installed
  - cannot install the best update candidate for package barrier-2.3.3-2.el8.x86_64
  - cannot install the best update candidate for package avahi-ui-gtk3-0.7-19.el8.x86_64
(try to add '--allowerasing' to command line to replace conflicting packages or '--skip-broken' to skip uninstallable packages or '--nobest' to use not only best candidate packages)

Actual results:

Can't upgrade completely to EL 8.4 with barrier installed from EPEL

Expected results:

Upgrade is smooth :)