diff --git a/myproject/products/migrations/0005_base_unit_nullable.py b/myproject/products/migrations/0005_base_unit_nullable.py
new file mode 100644
index 0000000..df2e93c
--- /dev/null
+++ b/myproject/products/migrations/0005_base_unit_nullable.py
@@ -0,0 +1,19 @@
+# Generated by Django 5.0.10 on 2026-01-20 21:26
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('products', '0004_add_unit_price_to_kit_item'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='product',
+            name='base_unit',
+            field=models.ForeignKey(blank=True, help_text='Единица хранения и закупки (банч, кг, шт). Товар принимается и хранится в этих единицах.', null=True, on_delete=django.db.models.deletion.PROTECT, related_name='products', to='products.unitofmeasure', verbose_name='Базовая единица'),
+        ),
+    ]
diff --git a/myproject/products/models/products.py b/myproject/products/models/products.py
index cdb066c..1d9c585 100644
--- a/myproject/products/models/products.py
+++ b/myproject/products/models/products.py
@@ -51,6 +51,8 @@ class Product(BaseProductEntity):
         on_delete=models.PROTECT,
         related_name='products',
         verbose_name="Базовая единица",
+        null=True,
+        blank=True,
         help_text="Единица хранения и закупки (банч, кг, шт). Товар принимается и хранится в этих единицах."
     )