Cannot enable repository "RHEL7.3 ISO" in Satellite 6.2.x

Issue

While enabling Red Hat Repositories ISOs in satellite server, we are receiving below error message:

There was an error attempting to enable or disable this repository: 
{"basearch"=>"x86_64", "releasever"=>"7.3"} are not valid substitutions for /content/dist/rhel/server/7/$releasever/$basearch/iso. No valid metadata files found for /content/dist/rhel/server/7/7.3/x86_64/iso

• Error Screen shot :
• Navigate to : Content>Red Hat Repositories>ISOs>Red Hat Enterprise Linux 7 Server>Red Hat Enterprise Linux 7 Server (ISOs)>Red Hat Enterprise Linux 7 Server ISOs x86_64 7.3