When trying to sync rhel-x86_64-baseos-8 hitting ERROR: null value in column "install_type" violates not-null constraint

Issue

When trying to sync the RHEL8 baseos channel the following error is observed:

Command: ['/usr/bin/cdn-sync', '-c', 'rhel-x86_64-baseos-8']
...
2019/05/13 17:04:55 +03:00 ERROR: null value in column "install_type" violates not-null constraint
DETAIL:  Failing row contains (122, null, ks-rhel-x86_64-baseos-8-8.0, rhn/kickstart/ks-rhel-x86_64-baseos-8-8.0, 4461, null, null, spacewalk-koan, 1, null, 2019-05-13 17:04:38.569469+03, 2019-05-13 17:04:38.569469+03, 2019-05-13 17:04:38.569469+03).

2019/05/13 17:04:55 +03:00 ERROR: null value in column "install_type" violates not-null constraint
DETAIL:  Failing row contains (122, null, ks-rhel-x86_64-baseos-8-8.0, rhn/kickstart/ks-rhel-x86_64-baseos-8-8.0, 4461, null, null, spacewalk-koan, 1, null, 2019-05-13 17:04:38.569469+03, 2019-05-13 17:04:38.569469+03, 2019-05-13 17:04:38.569469+03).
...