Flatten script delete object versions recorded in Content Staging, this cause an error during the sync process.

Error:
... failure (Can not serialize object to be sent)

error.log
[ Nov 09 2012 18:31:23 ] [tst01.local] eZRestApiEmbeddedClientStagingTransport::encodeObject:
Cannot encode object 13360 for push to staging server: version 5 not found