Can't sync new product because of "No declared artifact"

Creating new product for New Relic for both CentOS 7 and 8. The external repo for CentOS 7 from has no issues. However, the one from CentOS 8 ( fails to sync.

Expected outcome:
Sync should be successful like all other products.

Foreman and Proxy versions:
Foreman 2.5.2
Katello 4.1.3
Foreman and Proxy plugin versions:
foreman-tasks 4.1.4
foreman_chef 0.10.0
foreman_discovery 17.0.1
foreman_docker 5.0.0
foreman_remote_execution 4.5.5
katello 4.1.3

Distribution and version:
CentOS Linux release 7.9.2009 (Core)

Other relevant data:

No declared artifact with relative path “td-agent-bit-1.7.9-1.centos-8.x86_64.rpm” for content “<Package: td-agent-bit>”