Activity lock modification. Identifier of the activity that is locked. Type of activity that is locked. Valid values are FULFILLMENT_ORDER, FULFILLMENT_ORDER_DELIVERY, FULFILLMENT_ORDER_PICK, FULFILLMENT_ORDER_REVERSE_PICK, INVENTORY_ADJUSTMENT, INVENTORY_ADJUSTMENT_REASON, INVENTORY_ADJUSTMENT_TEMPLATE, ITEM_BASKET, RETURN, TRANSFER. This type can hold an enumerated string of max length of 30 characters. This type can hold a string of max length of 128 characters.