upgrade to Fedora 34 gets rdma-core-35.0-1.fc33.i686 has inferior architecture

I am trying to upgrade from Fedora 33 to Fedora 34 but the command
Code:sudo dnf system-upgrade download --refresh --releasever=34 fails with
Code:Error:
Problem: rdma-core-35.0-1.fc33.i686 has inferior architecture
- rdma-core-35.0-1.fc33.x86_64 does not belong to a distupgrade repository
- problem with installed package rdma-core-35.0-1.fc33.i686
(try to add '--skip-broken' to skip uninstallable packages)Other forums suggest Quote:

sudo dnf system-upgrade download --releasever=34 --allowerasing

What are the implications of the two 'solutions'? Is one better than the other?