(t:Track:Orchard {id: toInteger(event.UNIQUE_TRACK_ID)}) WITH *, [node IN [tw, lp, t] WHERE node IS NOT NULL] AS nodesToLock CALL apoc.lock.nodes(nodesToLock) OPTIONAL MATCH (lp)-[:CREATED_FROM]- (sameTw:TrackWriter {uniqueTrackId: toInteger(event.UNIQUE_TRACK_ID)}) WHERE sameTw.id <> toInteger(event.TRACK_WRITER_ID) FOREACH (noDup IN CASE WHEN sameTw IS NULL THEN [1] ELSE [] END | DETACH DELETE pit, tw ) FOREACH (dup IN CASE WHEN sameTw IS NOT NULL THEN [1] ELSE [] END | DETACH DELETE tw ) ]]>