copy to new revision requires project_id and ignores it

the API allows to copy to new revision setting "newRevision" to true

if a project id is set togeher with newRevision it is ignored (as it makes no sense obviously). if no project_id is set, there are strange errors like

<error>
  <message>[textgrid:9mw2] TG-crud#CREATE failed for source textgrid:9mw2.0: Resource is unknown to the TG-auth: null!! (org.apache.cxf.binding.soap.SoapFault: The given resource is unknown to the system.)</message>
  <type>NOT_SPECIFIED</type>
</error>

which is not really the cause (the project_id is missing).

so best would be to not require a project_id if newRevision is set to true