Not storing this message in Datastore, missingAttributeNames

I got this error from AWS IoT Analytics service after message is Transform in lambda: my lambda get as input a json format string

{
"id": "223",
"data": "valid-timestamp,1,2,3,4,5"
}

The data key holds my IoT data values on a specific timespan

The lambda parse the above input and return array of dict:

[
   {
       "id": "1",
       "timestamp": "valid-timestamp1",
        "value-1": "1",
        "value-2": "2",
         "value-3": "3"
   },
   {
       "id": "1",
         "timestamp": "valid-timestamp1",
        "value-1": "1",
        "value-2": "2",
         "value-3": "3"
   }
]

I did not succeeded to create a my_data_store I would be happy if someone can assist. Thanks

IoT Analytics doesn't support hyphens '-' in attribute names. If you want to use a separator, try using an underscore instead '_' and that should resolve your problem.