Duplicate incident numbers on tickets created form an Inbound action.DescriptionThe issue might occur when for a single email there are multiple inbound actions trigger.CauseIn this case customer had created an inbound action that was responsible for creation of an incident and there were few inbound actions which were responsible for updation of the incident. Moreover the inbound action which was responsible for creation of incident didn't have any qualification. That means it would hold true for any of the incoming email. 1. Customer sent first email, and it rightly created an incident. e.g - INC0172848. You would see a log line as - Processed 'Create Incident', created incident :INC0172848 2. Now end user replied to an email which was sent as an notification upon creation of incident - INC0172848. 3. The email was received in the instance as type reply and it triggered the Inbound action which was responsible for updating the incident. You would see a log statement as - Processed 'Update Incident', updated incident :INC0172848. The inbound action selects - INC0172848 as target record for the transaction. However since inbound action for creation of incident (say - Create Incident) doesn't have any qualification the inbound action also triggers and uses same ID (INC0172848) as target record. 4. In OOTB design incident table doesn't have column number set to Unique.ResolutionIn order to avoid this situation, make sure all the inbound actions have proper qualification. So that inbound action runs only for intended emails. Also customer's case set column Number as Unique for incident table.