Please follow the below steps if the user wishes to alter the mapped ISKU from CSKU to another ISKU after it has been mapped.

Step 1: Navigate to catalogue module and search for the CSKU that user wants to change the ISKU. Then click on the edit option

Step 2:

Search for the new desired ISKU in the Inventory SKU search bar. Select the new ISKU that user wants to change to and click on Save.