eZContentStaging: error synchronizing after copying a subtree

Steps to reproduce:

• Copy a subtree (via contextual menu or via ezsubtreecopy.php script)
• In content staging, select all events (generated for the the copied content) and synchronize

Result:

• The first content (starting node of the copy) will be correctly synchronized
• All the other sub nodes return 404:

Object 137 to be synchronised to feed demo: failure (HTTP error 404 (Not Found)) [Event 27]

It seems that the parent remote Id is not correct, the specific error returned by the target server is:

{"error_message":"Cannot find the location with remote id 'b969d27ce28e7824e8d7df100e615016'"}