We get a lot of server that are misidentified by the new "agent" for RHEL7 mostly and some RHEL6
They turn them into :
|Name||Serial Number||IP Address (Primary)||Operating System Version||Model||Hostname||Agent Version|
|Agent Managed - Unreachable||XXXX||XXXXX||XXXXX||Linux 7SERVER-X86_64||UCSC-C240-M4SX A0||XXXXXXXXX||75.0.85351.0|
It was Red Hat Enterprise Linux Server 7 X86_64 before the agent upgrade and the migration.
Which version of the 2018.08.008 rollup you got installed? The latest one is SRVA_00310, since the 2018.08.008 rollup was published again because of an issue found in the original release.
Have you tried to downgrade the agent on any of the misidentified machines? Did the downgrade solve the problem?