Package subscription-manager.x86_64 0:1.21.10-2.el7 not available

during server installation rhel 7.3 yum update fails because of missing subscription manager on repo, it works last Saturday 10.27.2018 but today there is new version to be updated but not found available

20181027
---> Package subscription-manager.x86_64 0:1.15.9-15.el7 will be updated
---> Package subscription-manager.x86_64 0:1.17.15-1.el7 will be an update
20181031
---> Package subscription-manager.x86_64 0:1.15.9-15.el7 will be updated
---> Package subscription-manager.x86_64 0:1.21.10-2.el7 will be an update

I have the same repolist:
repo id repo name status
rhel-7-server-extras-rpms/x86_64 Red Hat Enterprise Linux 7 Server - Extras (RPMs) 967
rhel-7-server-openstack-10-devtools-rpms/x86_64 Red Hat OpenStack Platform 10 Developer Tools for RHEL 7 (RPMs) 6
rhel-7-server-openstack-10-rpms/x86_64 Red Hat OpenStack Platform 10 for RHEL 7 (RPMs) 1,179
rhel-7-server-rh-common-rpms/x86_64 Red Hat Enterprise Linux 7 Server - RH Common (RPMs) 228
rhel-7-server-rpms/x86_64 Red Hat Enterprise Linux 7 Server (RPMs) 14,619
repolist: 16,999

any idea what is missing?

thanks