Hi,
one more option is there in process chain- delete the request form PSA.
daily your getting full load form the source to PSA you can use above mention option.
it will delete every time when scheduling the PC.
another option - delete target content.- create the variant give the DSO technical name.
it will delete the entire content form DSO.
one more option - delete change log table data form DSO.
Thanks,
Phani.