How to change sourcesystem-ID in BW

Hallo,

since we want to change the ID of one source system in BW, I wanted to know what`s the best way to handle this.

I`ve read that I first have to delete the sourcesystem entry in the list, create a new entry and then give it a new ID over

Tools → Assignment Source System to Source System ID

http://help.sap.com/saphelp_nw04/helpdata/en/80/1a63a6e07211d2acb80000e829fbfe/frameset.htm

But I am not sure how to delete the entry. Perhaps I need special permissions?

Thanks for your help and best regards!

Christian