Error when activating infosource

Dear Experts,

I am getting the following Error when I am activating the infosource 0customer for Master data. I replicated the source system BWSB_100, activated it and then assigned the source system BWSB_100 to infosource 0customer. Here is the detailed description:

InfoSource 0CUSTOMER is not available in source system BWSB_100

Message no. R3101

Diagnosis

The process to create a transfer structure for the InfoSource 0CUSTOMER was terminated.

InfoSource 0CUSTOMER is not known in source system BWSB_100.

The reason for this is that the InfoSource has been deleted from the source system, but the metadata has not yet been adjusted. This means that the metadata for source system BWSB_100 is therefore obsolete in the Business Information Warehouse.

System response

The action was terminated; data changes were reversed.

Procedure

Adjust the metadata for source system BWSB_100 in the Business Information Warehouse.

Can somebody advise me how to get through this?

Thank you.