A HOTFIX for this issue is available for Satellite 6.6.3
However the Hotfix RPMs are too large to be provided as a Bugzilla attachment, therefore please open a case with Red Hat Support if you need to obtain the Hotfix RPMs
Installation Instructions:
1. Take a backup or snapshot of Satellite server
2. Copy both HF RPMs to Satellite
3. # yum install ./candlepin-2.6.16-1.el7sat.noarch.rpm ./candlepin-selinux-2.6.16-1.el7sat.noarch.rpm
4. # satellite-maintain service restart