[Answered ]-Django migrate foreignkey with int index set to 10 digits not 11

You have one possible option to create forigenKey with int(10). by editing empty migration file.

First create empty migration file with

python manage.py makemigrations --empty myapp

Then edit operations = [] to excute rawsql with forigenKey int(10)
your new migrations file:

class Migration(migrations.Migration):

    dependencies = [
        ('myapp', '0009_auto_20160623_xxxxx'),
    ]

    operations = [
        migrations.RunSQL("ALTER TABLE myapp_table MODIFY field_id int(10);")
    ]

RunSQL requires sqlparse