No valid host error in OSP 10 if custom and default flavor having same specifications

Issue

• No valid host error in OSP 10 if custom and default flavor having same specifications.
• Why OSP 10 deployment is getting failed with "No valid host error" message?
• After successful overcloud deployment, wrong mapping found between ironic and nova.
• This issue is also seen when the deployment is done using default flavors with same hardware specification without custom flavors.