Only migrate file if it is found

couchpotato/core/database.py

@@ -318,8 +318,9 @@ class Database(object):
                     if file.get('type_id') == poster_type.get('id'):
                         if not added_media['files'].get('image_poster'):
                             added_media['files']['image_poster'] = []
-                        if file.get('path') not in added_media['files']['image_poster']:
+                        if file.get('path') not in added_media['files']['image_poster'] and os.path.isfile(file.get('path')):
                             added_media['files']['image_poster'].append(file.get('path'))
+
                 db.update(added_media)
 
                 for rel in releases: