Remove unique_together requirement on SalesOrderAllocation model

InvenTree/order/migrations/0068_alter_salesorderallocation_unique_together.py

@@ -0,0 +1,17 @@
+# Generated by Django 3.2.13 on 2022-05-16 14:35
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('order', '0067_auto_20220516_1120'),
+    ]
+
+    operations = [
+        migrations.AlterUniqueTogether(
+            name='salesorderallocation',
+            unique_together=set(),
+        ),
+    ]

InvenTree/order/models.py

@@ -1269,12 +1269,6 @@ class SalesOrderAllocation(models.Model):
     def get_api_url():
         return reverse('api-so-allocation-list')
 
-    class Meta:
-        unique_together = [
-            # Cannot allocate any given StockItem to the same line more than once
-            ('line', 'item'),
-        ]
-
     def clean(self):
         """
         Validate the SalesOrderAllocation object: