The MAC Address for duplicate computers are not the same. ITCM Agent has reported another NIC card as primary network address during registration process.
ITCM Engine uses following criterias to check if the computer does exist already in database :
(Preregistered computer has host_uuid set to NULL.)
2- host_name and serial number and mac_address.
(Preregistered computer has same host_name but mac_address may not equal.)
3- host_name and (mac_address or mac_address is empty or mac_address is NULL)
(Preregistered computer has same host_name but mac_address may not equal and not empty/NULL)
Client Automation 14.0 SP2