Python SDK bulk user creation from CSV failing on division_id

Trying to script a bulk user import from a CSV using the Genesys Cloud Python SDK. I’m iterating through rows and calling users_api.post_users(body=user_body). It works for the first few, then throws a 400 Bad Request saying division_id is invalid. The JSON payload looks fine when I print it. I’m guessing the SDK is caching something or I’m not handling the async batch correctly. Here’s the snippet I’m using. Any ideas?