diff --git a/core/management/commands/translate_doab_ids.py b/core/management/commands/translate_doab_ids.py
index 9a56d00a..baded557 100644
--- a/core/management/commands/translate_doab_ids.py
+++ b/core/management/commands/translate_doab_ids.py
@@ -1,4 +1,5 @@
 import csv
+import json
 from django.core.management.base import BaseCommand
 
 from regluit.core.models import Identifier
@@ -6,16 +7,23 @@ from regluit.core.models import Identifier
 class Command(BaseCommand):
     help = "translate doab ids to handles"
     def add_arguments(self, parser):
-        parser.add_argument('filename', nargs='+', help="filename")    
+        parser.add_argument('filename', nargs='?', help="filename")    
 
     def handle(self, filename, **options):
-        with open(filename,'r') as jsonfile:
+        self.stdout.write("doab ids to start: %s" % Identifier.objects.filter(type='doab').count())
+        with open(filename, 'r') as jsonfile:
             newdoab = json.loads(jsonfile.read())
         for doab in Identifier.objects.filter(type='doab'):
+            if doab.value.startswith("20.500.12854"):
+                continue
             if doab.value in newdoab:
-                doab.value = newdoab[doab.value]
-                doab.save()
+                # already done
+                if Identifier.objects.filter(type='doab', value=newdoab[doab.value]).exists():
+                    doab.delete()
+                else:
+                    doab.value = newdoab[doab.value]
+                    doab.save()
             else:
                 doab.delete()
-        self.stdout.write("new doab ids loaded!")
+        self.stdout.write("doab ids at end: %s" % Identifier.objects.filter(type='doab').count())