Hi Allard,
I tried the same thing in Axon 3 by appending GenericDomainEventMessage to eventstore with parameters - aggregate Type, aggregate Identifier, sequence No. and payload. I get this exception -
org.axonframework.commandhandling.model.ConcurrencyException: An event for aggregate [0c1277c1-488b-4c24-8506-424c9e88f0c9] at sequence [91] was already inserted.
Please help !