Fix related name

InvenTree/order/migrations/0003_auto_20190604_2226.py

@@ -0,0 +1,19 @@
+# Generated by Django 2.2 on 2019-06-04 12:26
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('order', '0002_auto_20190604_2224'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='purchaseorder',
+            name='supplier',
+            field=models.ForeignKey(help_text='Company', limit_choices_to={'is_supplier': True}, on_delete=django.db.models.deletion.CASCADE, related_name='purchase_orders', to='company.Company'),
+        ),
+    ]

InvenTree/order/models.py

@@ -68,7 +68,7 @@ class PurchaseOrder(Order):
                                 limit_choices_to={
                                     'is_supplier': True,
                                 },
-                                related_name=_('Orders'),
+                                related_name='purchase_orders',
                                 help_text=_('Company')
                                 )