I have followed the instructions in Synchronisation-between-OCS-server-master-slaves and all goes fine.
However, when a computer is deleted from the lower server it is not removed from the higher server.
As a consequence, the higher server always has lots of old computers deleted from the lower server.
NOTE: -r flag only removes successfully injected files that it does not apply here
Thanks in advance
NB: In the same sense ocsinventory-injector.pl:
OCSInventory-NG/OCSInventory-Server#418