In my experience the quickest way to disable notifications (and it is always a good idea when you have cloned Production to be a Development instance) is to update all notification method fields in table usp_contact to null. The notification method fields are c_cm_id1, c_cm_id2, c_cm_id3 and c_cm_id4.
Back up usp_contact first – e.g. by running
pdm_extract usp_contact > uspContact_bak.txt
The following pdm_extract command will give you all the current records with their notification methods. Note that the commands below will not copy and paste well, due to ‘smart quotes’ and other non-ASCII characters. Re-type rather than copying and pasting:
pdm_extract –f “select id, c_cm_id1, c_cm_id2, c_cm_id3, c_cm_id4 from usp_contact” > myUspData.txt
Replace all of the c_cm_idx fields with “” and then run
pdm_load –vf myUspData.txt
Regards,
James