DLV-490076 -The mid-sourcing delivery ID to which messages should be added is not specified (notification mode). Any info about this error?

[CampaignerForLife]

Hello, I did get this error yesterday in my Mid sourcing instance. It's now working properly, so I'd like to know why did this error appear and if I should worry about this. 

I did search and got no info about it. Any idea? 

[Craig_Thonis · Accepted solution]

Hello, this error has shown up intermittently over the years and typically indicates a deadlock on certain tables. That said, you could submit a ticket to Campaign Support and reference NEO-75920 to validate, as XML changes may be required to the notification template to mitigate this issue in the future.

[CampaignerForLife]

Hello, thank for your help, with this and some time we discovered there was a bugged registry in the database which wouldn't allow other registries to be added