prevent from creating duplicate ci records

[ssr99]

Two ci having same name same port same class  but ci which is created first (suppose created in jun) whose Install Directory is empty  but in second ci (suppose created in july) Install Directory is populated and both ci's having same discovery source as ServiceNow..

Is it Possible? if Yes then what should I do to remediate ci and how to prevent it from creating duplicate ci like?

[Manmohan K]

@ssr99 

Since the identifier is a combination of Name,TCP port, Class and Install Directory in your case. The two CIs are not duplicates