Hi @abhinav99 ,
This schema contains data of your recipient profiles with their history of last contact data w.r.t it's the table it belongs i.e. xtk:operator or nms:recipient, etc where @sourceId represents the primary key of the recipient.
To my knowledge, there is no such direct update data activity kind of workflow being used to update data to this table so assume the data in this table would be getting updated via the 'Billing' workflow nlserverModule script running behind.
Br,
Shubham