bugfix AqlExecutionExplainEntity indexes

Author: michele

ChangeLog.md

@@ -6,6 +6,7 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/) a
 
 ## [Unreleased]
 
+- bugfix AqlExecutionExplainEntity indexes
 - bugfix reconnection after more than 3 failures
 
 ## [6.2.0] - 2019-09-05