Ensure we only persist an event once at a time
Ensure we only persist an event once at a time

matrix-org/synapse,matrix-org/synapse,matrix-org/synapse,matrix-org/synapse,matrix-org/synapse,matrix-org/synapse,TribeMedia/synapse,TribeMedia/synapse,TribeMedia/synapse,TribeMedia/synapse,TribeMedia/synapse