Traceback (most recent call last):

 "C:\django19\lib\site-packages\django\db\backends\utils.py", line 64, in execute
return self.cursor.execute(sql, params)

 "C:\django19\lib\site-packages\django\db\backends\sqlite3\base.py", line 323, in execute
return Database.Cursor.execute(self, query, params)sqlite3.IntegrityError: NOT NULL constraint failed: cms_cmsplugin.position
Traceback (most recent call last):


 "run.py", line 2, in <module>

from layer
import EchoLayer
ImportError: No module named 'layer'