def METHOD_NAME(post_with_refs_and_tags: Tuple[MessageDb, PostDb]):
    original_message, original_post = post_with_refs_and_tags
    amend_message = MessageDb(
        item_hash="5678",
        sender="0xdeadbeef",
        type="POST",
        chain="ETH",
        signature=None,
        item_type="storage",
        item_content=None,
        content={"content": {"tags": ["amend", "mainnet"], "don't": "swap"}},
        time=dt.datetime(2023, 5, 2, tzinfo=dt.timezone.utc),
        channel=None,
        size=277,
    )
    amend_post = PostDb(
        item_hash=amend_message.item_hash,
        owner=original_message.sender,
        type="amend",
        ref=original_message.item_hash,
        amends=original_message.item_hash,
        channel=None,
        content=amend_message.content["content"],
        creation_datetime=amend_message.time,
        latest_amend=None,
    )
    return amend_message, amend_post