I'm running into a problem where I've set

primary_keys = []

on a stream, which in the schema message is being emitted as

"key_properties": null

, and breaking

pipelinewise-target-snowflake

, which expects either no key or an empty list in this scenario. Some traces:

{
  "type": "SCHEMA",
  "stream": "relationship_strengths",
  "schema": {
    "properties": {
      "internal_id": {
        "type": [
          "integer",
          "null"
        ]
      },
      "external_id": {
        "type": [
          "integer",
          "null"
        ]
      },
      "strength": {
        "type": [
          "number",
          "null"
        ]
      }
    },
    "type": "object"
  },
  "key_properties": null
}

target-snowflake       |     if len(stream_schema_message.get('key_properties', [])) > 0 else []
target-snowflake       | TypeError: object of type 'NoneType' has no len()

I'm not sure if the problem here lies in my stream definition, the SDK, or the target. Any help would be gladly appreciated.