The message is saying that a new record was created, that is no update.
That suggest that the project ID and name were not correct.
Read the project out to verify them.
When I do updates I just write the required fields and the field to updated.
For project the required attributes in an update are
<Project projectID="zproject" name="zproject">
You can also leave
" addedDate="2018-03-26"
out as the system will generate that.