page file name is not long enough. extended to 200.

comic/migrations/0016_auto_20160414_1335.py

@@ -0,0 +1,19 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.9.2 on 2016-04-14 12:35
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ('comic', '0015_auto_20160405_1126'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='comicpage',
+            name='page_file_name',
+            field=models.CharField(max_length=200),
+        ),
+    ]