diff --git a/InvenTree/stock/migrations/0044_auto_20200528_1036.py b/InvenTree/stock/migrations/0044_auto_20200528_1036.py
new file mode 100644
index 0000000000..2d026fe597
--- /dev/null
+++ b/InvenTree/stock/migrations/0044_auto_20200528_1036.py
@@ -0,0 +1,17 @@
+# Generated by Django 3.0.5 on 2020-05-28 10:36
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('stock', '0043_auto_20200525_0420'),
+    ]
+
+    operations = [
+        migrations.AlterUniqueTogether(
+            name='stockitem',
+            unique_together=set(),
+        ),
+    ]
diff --git a/InvenTree/stock/models.py b/InvenTree/stock/models.py
index 3d9394979c..7bebdefaba 100644
--- a/InvenTree/stock/models.py
+++ b/InvenTree/stock/models.py
@@ -292,11 +292,6 @@ class StockItem(MPTTModel):
     def get_part_name(self):
         return self.part.full_name
 
-    class Meta:
-        unique_together = [
-            ('part', 'serial'),
-        ]
-
     def format_barcode(self):
         """ Return a JSON string for formatting a barcode for this StockItem.
         Can be used to perform lookup of a stockitem using barcode
diff --git a/InvenTree/stock/serializers.py b/InvenTree/stock/serializers.py
index 91d9e03016..bde9b2b25b 100644
--- a/InvenTree/stock/serializers.py
+++ b/InvenTree/stock/serializers.py
@@ -104,12 +104,14 @@ class StockItemSerializer(InvenTreeModelSerializer):
     location_detail = LocationBriefSerializer(source='location', many=False, read_only=True)
     supplier_part_detail = SupplierPartSerializer(source='supplier_part', many=False, read_only=True)
 
-    tracking_items = serializers.IntegerField(source='tracking_info_count')
+    tracking_items = serializers.IntegerField(source='tracking_info_count', read_only=True, required=False)
 
     quantity = serializers.FloatField()
-    allocated = serializers.FloatField(source='allocation_count')
+    allocated = serializers.FloatField(source='allocation_count', required=False)
 
-    required_tests = serializers.IntegerField(source='required_test_count', read_only=True)
+    serial = serializers.IntegerField(required=False)
+
+    required_tests = serializers.IntegerField(source='required_test_count', read_only=True, required=False)
 
     def __init__(self, *args, **kwargs):