This read-write INTEGER controls a row in the concTrapReceiverTable: writing invalid(2) deletes that trap receiver entry, while adding a new receiver is done by setting concTrapReceiverAddr to an address not already listed, which the agent then automatically marks other(1). An administrator uses this mechanism to add or remove trap destinations without a dedicated row-creation command. For example, to stop sending traps to a decommissioned NMS, the admin writes invalid(2) to that receiver's entry to remove it from the table.