Help me out here, I have a SWIS error that hits ever 5 minutes and I'm not sure I can make sense of it!

In the C:\ProgramData\Solarwinds\InformationService\v3.0\Orion.InformationService.txt

2015-05-01 10:04:51,786 [51] ERROR SolarWinds.InformationService.Core.InformationService - SolarWinds.Orion.Core.BusinessLayer.DAL.AlertDAL.LoadSwisUris() 

Exception for Operation: <s:Envelope xmlns:s="http://www.w3.org/2003/05/soap-envelope" xmlns:a="http://www.w3.org/2005/08/addressing">

  <s:Header>

    <a:Action s:mustUnderstand="1">http://schemas.solarwinds.com/2007/08/informationservice/InformationService/QueryXml</a:Action>

    <a:MessageID>urn:uuid:13750ba6-8ae4-4271-a20d-59b996fdfcba</a:MessageID>

    <a:ReplyTo>

      <a:Address>http://www.w3.org/2005/08/addressing/anonymous</a:Address>

    </a:ReplyTo>

    <SwisSettings xmlns="http://schemas.solarwinds.com/2007/08/informationservice" xmlns:i="http://www.w3.org/2001/XMLSchema-instance">

      <ApplicationTag>SolarWinds.Orion.Core.BusinessLayer.DAL.AlertDAL.LoadSwisUris() </ApplicationTag>

      <DataProviderTimeout>-PT1S</DataProviderTimeout>

    </SwisSettings>

    <i18n xmlns="http://schemas.solarwinds.com/2007/08/informationservice" xmlns:i="http://www.w3.org/2001/XMLSchema-instance">

      <Culture>en-US</Culture>

    </i18n>

    <a:To s:mustUnderstand="1">net.tcp://localhost:17777/SolarWinds/InformationService/v3/Orion/certificate</a:To>

  </s:Header>

  <s:Body>

    <QueryXml xmlns="http://schemas.solarwinds.com/2007/08/informationservice">

      <query>SELECT CustomPollerAssignmentID, Uri FROM Orion.NPM.CustomPollerAssignmentOnNode WHERE CustomPollerAssignmentID = @param_0 OR CustomPollerAssignmentID = @param_1 RETURN XML RAW</query>

      <parameters>

        <item xmlns="http://schemas.solarwinds.com/2007/08/informationservice/propertybag">

          <key>param_0</key>

          <type>System.String</type>

          <value>6165</value>

        </item>

        <item xmlns="http://schemas.solarwinds.com/2007/08/informationservice/propertybag">

          <key>param_1</key>

          <type>System.String</type>

          <value>6165</value>

        </item>

      </parameters>

    </QueryXml>

  </s:Body>

</s:Envelope>

2015-05-01 10:04:51,786 [51] ERROR SolarWinds.InformationService.Core.InformationService - SolarWinds.Orion.Core.BusinessLayer.DAL.AlertDAL.LoadSwisUris() 

Exception caught in method RunQuery

System.Data.SqlClient.SqlException (0x80131904): Conversion failed when converting from a character string to uniqueidentifier.

   at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)

   at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose)

   at System.Data.SqlClient.TdsParser.TryRun(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj, Boolean& dataReady)

   at System.Data.SqlClient.SqlDataReader.TryHasMoreRows(Boolean& moreRows)

   at System.Data.SqlClient.SqlDataReader.TryReadInternal(Boolean setTimeout, Boolean& more)

   at System.Data.SqlClient.SqlDataReader.Read()

   at SolarWinds.InformationService.DataProviders.SqlQueryRelation.<GetEnumerator>d__0.MoveNext()

   at SolarWinds.Data.Query.PhysicalQueryPlan.ProjectOp.<GetEnumeratorInternal>d__0.MoveNext()

   at SolarWinds.Data.Query.PhysicalQueryPlan.PhysicalQueryPlan.<GetEnumerator>d__0.MoveNext()

   at SolarWinds.InformationService.Serialization.XmlResponseSerializerSimple..ctor(IQueryResultReader reader, Boolean includeQueryPlan)

   at SolarWinds.InformationService.Serialization.XmlSerializer.GetSerializer()

   at SolarWinds.InformationService.Serialization.XmlSerializer.PrepareSerialize(IQueryExpr query, ISchema schema, IQueryResultReader reader)

   at SolarWinds.InformationService.Core.InformationService.RunQuery(String query, IDictionary`2 parameters, IDataSerializer serializer)

ClientConnectionId:14956ab3-482a-4c12-9449-b4679f30346c