MCRM_SETTINGS report cant change the already existing consumer

Hi Middleware gurus,

I have a problem in setting up of  CRM middleware setup with ECC .  The scenario is ECC is connected to CRM already and data is transferred, so as a result of that for all the objects in CRM the default consumer is CRM.  And now due to some requirements , i want to connect this same CRM system to another ECC and so the requirement is to change this already existing default consumer to a new consumer as per the new ECC system.

SO, I ran the report MCRM_SETTINGS to change the consumer but the result says- the object is already a consumer.

So, now the question is - cant i over write the already existing consume  to a new consumer...

Regards,

Neni.