Answered: Lots of host duplicates since server/agent update 2.3

I agree with @bugmenot, I created the table as mentioned by frankb, but I still see the error from a client.  I have multiple servers running agent v2.3 with the same hardware (ProLiant DL380 Gen9):

RedHatEnterprise 7.1 (Linux 3.10.0-327.18.2.el7.x86_64) - Seems to report OK

CentOS 7.2.1511 (Linux 3.1.0-327.el7.x86_64) - Not working

Server - 2.3 - CentOS 7.3.116 - AUTO_DUPLICATE_LVL set to hostname and serial