Duplicate record for new collections/tables

[WolframHempel]

{"_id":"ObjectId()","text":"something","__ds":{"_v":1},"ds_key":"ixqb796a-1ezjx1aff6m"}
{"_id":"ObjectId()","__ds":{"_v":0},"ds_key":"ixqb796a-1ezjx1aff6m"}

when I create a new Record for a Collection that was not existed before it also creates a duplicated document with the same ds_key what the first Record will have with a version 0
it is not a big problem as I can avoid finding it but does it have a purpose or am I doing something wrong with how I set my first Record?
this only happens with the very first Record for an empty Collection only, after that no similar problems arise

[sergej-kurakin]

I'm having same issue with empty MongoDB collection when inserting records into empty collection.
Deepstream 2.1.3, MongoDB 3.4 Community Edition.

db.character.find({ds_key:"1"}, {_id:1, "__ds._v":1})
{ "_id" : ObjectId("58ff0e7ee615fac3fcf69f8e"), "__ds" : { "_v" : 0 } }
{ "_id" : 1, "__ds" : { "_v" : 1 } }