---
fixes:
  - |
    The `os-volume_attachments`_ update API, commonly referred to as the swap
    volume API will now return a ``400`` (BadRequest) error when attempting to
    swap from a multi attached volume with more than one active read/write
    attachment resolving `bug #1775418`_.

    .. _os-volume_attachments: https://developer.openstack.org/api-ref/compute/?expanded=update-a-volume-attachment-detail
    .. _bug #1775418: https://launchpad.net/bugs/1775418
