This object is the sysUpTime at the most recent change to either the destination-count address or its enable flag. This mirrors the source-side discontinuity timestamp, marking when the destination-filtered counter was last reset or retargeted, so an admin comparing before-and-after values for the corresponding destination packet count knows not to treat a filter change as an actual traffic change. This timestamp updating right when an admin retargets the destination filter to a new suspected node explains a sudden reset-to-near-zero in the corresponding destination packet count, rather than that node's inbound traffic actually having dropped to near zero.