diff --git a/app/migrations/0021_alter_range_checked.py b/app/migrations/0021_alter_range_checked.py
new file mode 100644
index 0000000..05af292
--- /dev/null
+++ b/app/migrations/0021_alter_range_checked.py
@@ -0,0 +1,18 @@
+# Generated by Django 3.2.5 on 2021-11-25 05:48
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('app', '0020_alter_range_mother_range'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='range',
+            name='checked',
+            field=models.BooleanField(blank=True, default=False, null=True),
+        ),
+    ]
diff --git a/app/models.py b/app/models.py
index 4ce3080..ea79c0a 100644
--- a/app/models.py
+++ b/app/models.py
@@ -97,7 +97,7 @@ class Range(models.Model):
     peak_latitude = models.TextField(blank=True, null=True)
     peak_longitude = models.TextField(blank=True, null=True)
     comments = models.TextField(blank=True, null=True)
-    checked = models.BooleanField(default=False)
+    checked = models.BooleanField(default=False, null=True, blank=True)
     source = models.TextField(blank=True, null=True)
     range_alternate_id = models.TextField(blank=True, null=True)
     geologic_region = models.TextField(blank=True, null=True)