The Source system is generating LUWs that can be send to BI systems. There is just one valid R/3 - BI connection.
But a huge number of LUWs are being generated for an invalid BI system. Invalid - because there is no connection between this BI system and the source system.
These LUWs keep on generating but there is no request from the invalid BI system.
I checked in RSA7, but am not sure how can I stop these LUWs from generating for the invalid BI system.
In RSA7 you can see the delta queue and target system of that delta queue.
If you are really not using that delta queue, you can do 2 things
1)goto respective BI system and delete the init request for that particular data source
just simply delete the delta queue in RSA7.
If you have active init then only LUWs comes to RSA7.