I'm running on Elasticsearch 5.5
I have a document with the following mapping

    "mappings": {
      "shops": {
        "properties": {
          "locations": {
            "type": "geo_point"
          },
          "name": {
            "type": "keyword"
          },
          "suggest": {
            "type": "completion",
            "contexts": [
              {
                "name": "location",
                "type": "GEO",
                "precision": "10m",
                "path": "locations"
              }
            ]
          }
        }
      }

I'll add a document as follows:

    PUT my_index/shops
    {  
      "name":"random shop",
      "suggest":{  
        "input":"random shop"
      },
      "locations":[  
        {  
          "lat":42.38471212,
          "lon":-71.12612357
        }
      ]
    }
I try to query for the document with the follow JSON call

    GET my_shops/_search
    {
      "suggest": {
        "result": {
          "prefix": "random",
          "completion": {
            "field": "suggest",
            "size": 5,
            "fuzzy": true,
            "contexts": {
             "location": [{
                "lat": 42.38471212,
                "lon": -71.12612357,
                "precision": "10mi"
              }]
            }
         }
        }
      }
    }

I get the following errors:

![image|583x500](upload://1tDngYxw1ijVhK8Ko6vinFeMXfH.png)

But when I change the "precision" field to an int, I get the intended search results.
I'm confused on two fronts.
1. Why is there a context error? The documentation seems to say that this is ok
https://www.elastic.co/guide/en/elasticsearch/reference/5.5/suggester-context.html

2. Why can't I use string values for the precision values?
At the bottom of the page, I see that the precision values can take either distances or numeric values.

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