diff --git a/src/main/resources/alma/fix/relatedRessourcesAndLinks.fix b/src/main/resources/alma/fix/relatedRessourcesAndLinks.fix
index 60f47d0e1..f3eafb3a5 100644
--- a/src/main/resources/alma/fix/relatedRessourcesAndLinks.fix
+++ b/src/main/resources/alma/fix/relatedRessourcesAndLinks.fix
@@ -342,21 +342,23 @@ set_array("related[]")
 do list(path:"775??|776??", "var":"$i")
   unless any_match ("$i.i", ".*eproduktion von.*|.*eproduktion")
     do list_as("$hbzId":"$i.w", "$isbn":"$i.z", "$label":"$i.t", "$note":"$i.n", "$issn":"$i.x", "$info":"$i.i")
-      set_hash("related[].$append")
-      if all_match("$hbzId", "^\\((DE-600|DE-605)\\).*$")
-        copy_field("$hbzId", "related[].$last.id")
+      unless in("$isbn", "related[].*.isbn[]") # Skip duplicates
+        set_hash("related[].$append")
+        if all_match("$hbzId", "^\\((DE-600|DE-605)\\).*$")
+          copy_field("$hbzId", "related[].$last.id")
+        end
+        set_array("related[].$last.note[]")
+        paste("related[].$last.note[].$append","$info", "$note")
+        replace_all("related[].$last.note[].$last", "Erscheint auch als ","")
+        copy_field("$label", "related[].$last.label")
+        set_array("related[].$last.issn[]")
+        copy_field("$issn", "related[].$last.issn[].$append")
+        set_array("related[].$last.isbn[]")
+        isbn("$isbn", to:"isbn13")
+        copy_field("$isbn", "related[].$last.isbn[].$append")
+        isbn("$isbn", to:"isbn10")
+        copy_field("$isbn", "related[].$last.isbn[].$append")
       end
-      set_array("related[].$last.note[]")
-      paste("related[].$last.note[].$append","$info", "$note")
-      replace_all("related[].$last.note[].$last", "Erscheint auch als ","")
-      copy_field("$label", "related[].$last.label")
-      set_array("related[].$last.issn[]")
-      copy_field("$issn", "related[].$last.issn[].$append")
-      set_array("related[].$last.isbn[]")
-      isbn("$isbn", to:"isbn13")
-      copy_field("$isbn", "related[].$last.isbn[].$append")
-      isbn("$isbn", to:"isbn10")
-      copy_field("$isbn", "related[].$last.isbn[].$append")
     end
   end
 end
diff --git a/src/test/resources/alma-fix/990206060640206441.json b/src/test/resources/alma-fix/990206060640206441.json
index 25c7a1745..bdf4c8e96 100644
--- a/src/test/resources/alma-fix/990206060640206441.json
+++ b/src/test/resources/alma-fix/990206060640206441.json
@@ -78,9 +78,6 @@
   "related" : [ {
     "note" : [ "Druck-Ausgabe" ],
     "isbn" : [ "9783412221607", "3412221600" ]
-  }, {
-    "note" : [ "Druck-Ausgabe" ],
-    "isbn" : [ "9783412221607", "3412221600" ]
   } ],
   "inCollection" : [ {
     "id" : "http://lobid.org/organisations/DE-655#!",
diff --git a/src/test/resources/alma-fix/990213367870206441.json b/src/test/resources/alma-fix/990213367870206441.json
index b7484d593..ddff4a989 100644
--- a/src/test/resources/alma-fix/990213367870206441.json
+++ b/src/test/resources/alma-fix/990213367870206441.json
@@ -60,9 +60,6 @@
   "related" : [ {
     "note" : [ "Druck-Ausgabe" ],
     "isbn" : [ "9783736992580", "3736992580" ]
-  }, {
-    "note" : [ "Druck-Ausgabe, Paperback" ],
-    "isbn" : [ "9783736992580", "3736992580" ]
   } ],
   "inCollection" : [ {
     "id" : "http://lobid.org/organisations/DE-655#!",
diff --git a/src/test/resources/alma-fix/990367731740206441.json b/src/test/resources/alma-fix/990367731740206441.json
index 544b1afd0..ff2254c44 100644
--- a/src/test/resources/alma-fix/990367731740206441.json
+++ b/src/test/resources/alma-fix/990367731740206441.json
@@ -62,8 +62,6 @@
     "note" : [ "Druck-Ausgabe" ],
     "isbn" : [ "9783451388798", "3451388790" ],
     "label" : "lobid Ressource"
-  }, {
-    "isbn" : [ "9783451388798", "3451388790" ]
   } ],
   "inCollection" : [ {
     "id" : "http://lobid.org/organisations/DE-655#!",