About Data Stores : Clearing the data store
  
Clearing the data store
Appliances write data references to the data store until it reaches capacity. You must clear the data store:
after enabling, disabling, or changing encryption.
before downgrading to an earlier software version.
to redeploy an active-active synchronization pair.
after testing or evaluating the appliance.
after receiving a “data store corruption” or “data store clean required” alarm message.
About data stores
Clearing the data store