CMDB Discovery Not Updating First Discovered field while it is updating Most Recent Discovery

[RasMin]

Hi

Looking into an issue where First Discovered date of CIs are not getting updated while Most recent discovery date is updated. As we checked in reconciliation rules, attribute list is not having both the fields. Please advice where to check for the field mappings OR where we need to add the field first_discovered so it updates while discovering CIs.

Thanks in advance 

[VivekSattanatha]

@RasMin 

For which table it is not getting updated?

[RasMin]

@VivekSattanatha 

One example is Disk (cmdb_ci_disk)