(end:NrContribution:NrPerformance) WITH start, end, collect(rel) as allRel, count(rel) as countRels, collect(distinct type(rel)) as typesRel WHERE countRels > 1 with start, end, allRel, count(typesRel) as typesRelCount where typesRelCount = 1 CALL apoc.refactor.mergeRelationships(allRel, {properties:"discard"}) YIELD rel RETURN rel ]]>