Schema change issue

gistfile1.txt

// Old schema
pulldowns: [
          {
            type: 'filtering',
            enable: true
          },
          {
            type: 'annotations',
            enable: true,
            annotations: [{name: 'old'}]
          }
        ],

// new schema
annotations: {
list: [ {name: 'old'}  ]
}

// if you have something like this in your ES you will get the error
pulldowns: [          
          {
            type: 'annotations',
            enable: true,            
          }
        ],
See the missing annotations: [] array. When the schema upgrades to the new schema the annoatations.list will be undefined.