Caused by: org.elasticsearch.index.engine.VersionConflictEngineException: [threads][0] [thread][1311572]: version conflict, current [4], provided [3]
	at org.elasticsearch.index.engine.robin.RobinEngine.innerIndex(RobinEngine.java:525)
	at org.elasticsearch.index.engine.robin.RobinEngine.index(RobinEngine.java:479)
	at org.elasticsearch.index.shard.service.InternalIndexShard.index(InternalIndexShard.java:323)
	at org.elasticsearch.action.index.TransportIndexAction.shardOperationOnPrimary(TransportIndexAction.java:206)
	at org.elasticsearch.action.support.replication.TransportShardReplicationOperationAction$AsyncShardOperationAction.performOnPrimary(TransportShardReplicationOperationAction.java:529)
	at org.elasticsearch.action.support.replication.TransportShardReplicationOperationAction$AsyncShardOperationAction.start(TransportShardReplicationOperationAction.java:431)
	at org.elasticsearch.action.support.replication.TransportShardReplicationOperationAction$AsyncShardOperationAction.start(TransportShardReplicationOperationAction.java:338)
	at org.elasticsearch.action.support.replication.TransportShardReplicationOperationAction.doExecute(TransportShardReplicationOperationAction.java:104)
	at org.elasticsearch.action.index.TransportIndexAction.innerExecute(TransportIndexAction.java:135)
	at org.elasticsearch.action.index.TransportIndexAction.doExecute(TransportIndexAction.java:117)
	at org.elasticsearch.action.index.TransportIndexAction.doExecute(TransportIndexAction.java:67)
	at org.elasticsearch.action.support.TransportAction.execute(TransportAction.java:61)
	at org.elasticsearch.action.update.TransportUpdateAction.shardOperation(TransportUpdateAction.java:220)
	at org.elasticsearch.action.update.TransportUpdateAction.shardOperation(TransportUpdateAction.java:148)
	at org.elasticsearch.action.update.TransportUpdateAction.shardOperation(TransportUpdateAction.java:71)
	at org.elasticsearch.action.support.single.instance.TransportInstanceSingleOperationAction$AsyncSingleAction$1.run(TransportInstanceSingleOperationAction.java:179)
	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
	... 1 more