"version" in API v3 domain is ambiguous

API version and domain version have the same key which is problematic when doing a domain update from the api.

When doing the following, the civicrm_domain.version is updated and set to '3'.
$results = civicrm_api("Domain", "update", array(version => '3', 'id' => 1, 'config_backend' => ...);

Can we change the key to something like domain_version or otherwise forbid the change of domain version from the api.