Make meta not-null.

django_etesync/migrations/0033_auto_20200317_2010.py

@@ -0,0 +1,19 @@
+# Generated by Django 3.0.3 on 2020-03-17 20:10
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('django_etesync', '0032_auto_20200317_1513'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='collectionitemrevision',
+            name='meta',
+            field=models.BinaryField(default=b'', editable=True),
+            preserve_default=False,
+        ),
+    ]