CALL apoc.trigger.add( 'setSubaccountUUID', ' UNWIND apoc.trigger.nodesByLabel($assignedLabels, "Subaccount") AS n SET n.uuid = COALESCE(n.uuid, apoc.create.uuid()) ', {phase: 'before'} ); MATCH (s:Subaccount) WHERE s.uuid is null SET s.uuid = apoc.create.uuid();