Tested to rename my properties with email as alias, solved the problem.

This cant be right?!

How about you can you help with setting up my contact page

?

For anyone else finding this thread, I hit the following message being logged following an upgrade from 7.6.13 to 7.14.0:

Field "level" is listed multiple times in the index set "InternalIndexSet". Please ensure all names are unique, Provider=InternalIndexer, NodeId=12345

As Anders suggested, renaming the field called "level" on one of my document types fixed it. I believe the cause is that somewhere between 7.6.13 and 7.14.0 the Umbraco core added its own "level" field to the internal and external Examine indexes, which explains the reference in the message to being listed multiple times. So if you've just upgraded and you're seeing this, that could be the reason.

We've seen the following in our logs for Umbraco 7.13.2:

Field "id" is listed multiple times in the index set
Field "nodeName" is listed multiple times in the index set
Field "nodeName" is listed multiple times in the index set

I've managed to resolve for all custom indexes by removing the following from the custom indexes from IndexUserFields :

  <add Name="id" />
  <add Name="nodeName"/>
  <add Name="nodeTypeAlias" />

Note the fields are still shown in the the Umbraco Back office as system fields

This has resolved the issue there, the site has been through a few upgrades so I'm uncertain as to when the issue was introduced. The error is still recorded in the logs InternalIndexSet and ExternalIndexSet which have no custom fields set :

<IndexSet SetName="ExternalIndexSet" IndexPath="~/App_Data/TEMP/ExamineIndexes/External/" />
<IndexSet SetName="InternalIndexSet" IndexPath="~/App_Data/TEMP/ExamineIndexes/Internal/"/>

We're due an upgrade to 7.15.3, which version compare says

Updates to latest Examine

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