synchronization process for cases inwhich a row is inserted into or deleted from the DSDT. If arow is inserted, its
primary key and message digest values ofthe new row are added in the DSMDT. For a deleted row, itsMDV column
value is set to NULL in the DSMDT. If the rowis deleted without setting the column value to NULL, itis
indistinguishable from inserting a row into the DSDT.