diff --git a/Elwig/Models/Dtos/CreditNoteData.cs b/Elwig/Models/Dtos/CreditNoteData.cs
index 09a88d2..ef3ef91 100644
--- a/Elwig/Models/Dtos/CreditNoteData.cs
+++ b/Elwig/Models/Dtos/CreditNoteData.cs
@@ -54,7 +54,7 @@ namespace Elwig.Models.Dtos {
                     LEFT JOIN delivery_part_bucket b ON (b.year, b.did, b.dpnr) = (d.year, d.did, d.dpnr)
                     LEFT JOIN payment_variant v ON v.year = d.year
                     LEFT JOIN payment_delivery_part p ON (p.year, p.did, p.dpnr, p.avnr) = (d.year, d.did, d.dpnr, v.avnr)
-                    LEFT JOIN payment_delivery_part_bucket pb ON (pb.year, pb.did, pb.dpnr, pb.bktnr) = (b.year, b.did, b.dpnr, b.bktnr)
+                    LEFT JOIN payment_delivery_part_bucket pb ON (pb.year, pb.did, pb.dpnr, pb.bktnr, pb.avnr) = (b.year, b.did, b.dpnr, b.bktnr, v.avnr)
                     LEFT JOIN credit c ON (c.year, c.avnr, c.mgnr) = (d.year, v.avnr, d.mgnr)
                 WHERE b.value > 0 AND (d.year = {y} OR {y} IS NULL) AND (v.avnr = {v} OR {v} IS NULL) AND (d.mgnr = {m} OR {m} IS NULL)
                 ORDER BY d.year, v.avnr, d.mgnr, d.lsnr, d.dpnr