diff --git a/InvenTree/part/models.py b/InvenTree/part/models.py
index f5daf0915a..c2549a7498 100644
--- a/InvenTree/part/models.py
+++ b/InvenTree/part/models.py
@@ -187,3 +187,4 @@ class PartParameter(models.Model):
     class Meta:
         verbose_name = "Part Parameter"
         verbose_name_plural = "Part Parameters"
+        unique_together = ('part', 'template')
diff --git a/InvenTree/part/serializers.py b/InvenTree/part/serializers.py
index 48719e9cd5..1b4bd9a428 100644
--- a/InvenTree/part/serializers.py
+++ b/InvenTree/part/serializers.py
@@ -3,13 +3,13 @@ from rest_framework import serializers
 from .models import Part, PartCategory, PartParameter, PartParameterTemplate
 
 
-class PartParameterSerializer(serializers.ModelSerializer):
+class PartParameterSerializer(serializers.HyperlinkedModelSerializer):
     """ Serializer for a PartParameter
     """
 
     class Meta:
         model = PartParameter
-        fields = ('pk',
+        fields = ('url',
                   'part',
                   'template',
                   'name',
@@ -45,11 +45,11 @@ class PartCategorySerializer(serializers.HyperlinkedModelSerializer):
                   'path')
 
 
-class PartTemplateSerializer(serializers.ModelSerializer):
+class PartTemplateSerializer(serializers.HyperlinkedModelSerializer):
 
     class Meta:
         model = PartParameterTemplate
-        fields = ('pk',
+        fields = ('url',
                   'name',
                   'units',
                   'format')
diff --git a/InvenTree/track/models.py b/InvenTree/track/models.py
index 445e6d30fc..b03cdae52c 100644
--- a/InvenTree/track/models.py
+++ b/InvenTree/track/models.py
@@ -12,8 +12,6 @@ class UniquePartManager(models.Manager):
 
     def create(self, *args, **kwargs):
 
-        print(kwargs)
-
         part = kwargs.get('part', None)
 
         if not part.trackable: