Power BI POWER QUERY Concaténer des éléments

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WclLSUaqqqlKK1YlWcgayk5KSwGxHILsICOCcTCAAc0A6CkEArqcMDODcXCBQio0FAA==", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [ENTETE1 = _t, ENTETE2 = _t]),
    GroupBy_Entete1 = Table.Group(Source, {"ENTETE1"}, {{"Data", each _, type table [ENTETE1=nullable text, ENTETE2=nullable text]}}),
    AddColumn_Entete2 = Table.AddColumn(GroupBy_Entete1, "ENTETE2", each Text.Combine([Data][ENTETE2], ";")),
    RemoveColumn_Data = Table.RemoveColumns(AddColumn_Entete2,{"Data"})
in
    RemoveColumn_Data