duplicate rules not applied correctly.

Hello,

the rule set to check for duplicate pc "MAC and Serial", is often not applied correctly.

Some PCs are inventoried as duplicates even with the same "MAC and Serial" In activity.log i have this information: Tue Oct 6 11:06:26 2020;53692;517;PCXY-2020-09-30-07-34-54;OCS-NG_WINDOWS_AGENT_v2.6.0.0;duplicate;replacing_error

OCS Server 2.7
OS Ubuntu 18.04 LTS