DNF update fails with "Package is filtered out by exclude filtering" error

Issue

• DNF update fails with "Package is filtered out by exclude filtering" error:

  Example:

  Problem 1: package glibc-headers-2.28-236.el8.7.x86_64 from rhel-8-for-x86_64-baseos-rpms requires glibc = 2.28-236.el8.7, but none of the providers can be installed
  - cannot install the best update candidate for package glibc-headers-2.28-189.5.el8_6.x86_64
  - package glibc-2.28-236.el8.7.x86_64 from rhel-8-for-x86_64-baseos-rpms is filtered out by exclude filtering
  - package glibc-2.28-236.el8.7.i686 from rhel-8-for-x86_64-baseos-rpms is filtered out by exclude filtering