(t:Track:Orchard {id: toInteger(event.TRACK_ID)}) WITH *, [node IN [ta, lp, t] WHERE node IS NOT NULL] AS nodesToLock CALL apoc.lock.nodes(nodesToLock) OPTIONAL MATCH (lp)-[:CREATED_FROM]-(sameTa:TrackArtist {type: event.TYPE, trackId: toInteger(event.TRACK_ID)}) WHERE sameTa.id <> toInteger(event.ID) FOREACH (noDup IN CASE WHEN sameTa IS NULL THEN [1] ELSE [] END | DETACH DELETE pit, ta ) FOREACH (dup IN CASE WHEN sameTa IS NOT NULL THEN [1] ELSE [] END | DETACH DELETE ta ) ]]>