diff --git a/src-db/database/model/tables/FIN_PAYMENT.xml b/src-db/database/model/tables/FIN_PAYMENT.xml
index 0c3831ca4d..961492281f 100644
--- a/src-db/database/model/tables/FIN_PAYMENT.xml
+++ b/src-db/database/model/tables/FIN_PAYMENT.xml
@@ -191,6 +191,10 @@
         <index-column name="C_BPARTNER_ID"/>
         <index-column name="functionBasedColumn" functionExpression="OBEQUALS(GENERATED_CREDIT,USED_CREDIT)"/>
       </index>
+      <index name="FIN_PAYMENT_DOCUMENTNO_ID" unique="false">
+        <index-column name="DOCUMENTNO"/>
+        <index-column name="FIN_PAYMENT_ID"/>
+      </index>
       <index name="FIN_PAYMENT_POSTED" unique="false">
         <index-column name="POSTED"/>
       </index>