Need to easily transfer a project and all its tasks, subtasks and time tracked, into another client. I've found you can do this with Tasks, but since I have some 1500 tasks under various projects to "move" - this is not an option.

After doing a import of some 1500 task from several client projects from Plutio, I did a mistake and many projects ended up as their "own" clients.

Example;

A project A1 for client ABC ended up being it's own client with the name A1 instead of imported under the client ABC as project A1.