[Flow] Problems with elasticsearch-2.0.0

[Robin Mansholt]

Hello,

i want to update our elasticSearch from 1.6.2 to 2.0.0. But with the version 2.0.0 we got serval problems.
If i try to execute following command:

/flow nodeindex:build

i got the following error:
Uncaught Exception: TYPO3\Flow\Error\Exception

Message
  Notice: Array to string conversion in
  public_html/Packages/Application/Flowpack.ElasticSearch/Classes/Flowpack/ElasticSearch/Transfer/Exception.php
  line 39

The elasticsearch log has the following informations:
java.lang.IllegalArgumentException: Mapper for [__fulltext.name] conflicts with existing mapping in other types:
[mapper [__fulltext.name] is used by multiple types. Set update_all_types to true to update [boost] across all types.]

here is a little snippet of my nodeTypes.yaml. I think the problem is located below
'__fulltext':
      search:
        indexing: ''
        elasticSearchMapping:
          type: object
          properties:
            'name':
              type: string
              include_in_all: true
              boost: 4
            'content':
              type: string
              include_in_all: true
              boost: 3
            'user':
              type: string
              include_in_all: true
              boost: 2
            'date':
              type: string
              include_in_all: true
              boost: 1

Does anyone know this problems? Is it essential to update our elasticsearch version? Or should we use our old version?
thanks for help 
regards