Our Bounce management on Live Campaign has not been clearing out the email from the email account in awhile I noticed it hasn't registered any emails as bounced since the same time. Looking at the admin logs, I see this error showing in relation to the bounce management on the scheduler:

04/23/2020 08:28:52

Scheduler Event Failure

THREAD ID 45 TYPE Mandeeps.DNN.Modules.LiveCampaign.Components.Scheduler.L 

THREAD ID:45

TYPE:Mandeeps.DNN.Modules.LiveCampaign.Components.Scheduler.LiveCampaignBounceManager,Mandeeps.DNN.Modules.LiveCampaign

EXCEPTION:Argument is out of range of valid values. It must be in a range from 1 to 2147483647. Parameter name: messageInboxIndex Actual value was 0.

RESCHEDULED FOR:4/23/2020 8:24:58 AM

SOURCE:STARTED_FROM_SCHEDULE_CHANGE

ACTIVE THREADS:0

FREE THREADS:3

READER TIMEOUTS:0

WRITER TIMEOUTS:0

IN PROGRESS:0

IN QUEUE:12

Server Name: VDS301

What would cause this? We have all of the correct parameters set up in bounce management..