Update groupfeatures_session_purposes field migration to match change…

… to model. Commit ready for merge.

 - Legacy-Id: 19636

ietf/group/migrations/0052_groupfeatures_session_purposes.py

@@ -3,9 +3,9 @@
 # Generated by Django 2.2.24 on 2021-09-26 11:29
 
 from django.db import migrations
-import ietf.group.models
 import ietf.name.models
-import jsonfield.fields
+import ietf.utils.db
+import ietf.utils.validators
 
 
 class Migration(migrations.Migration):
@@ -19,6 +19,6 @@ class Migration(migrations.Migration):
         migrations.AddField(
             model_name='groupfeatures',
             name='session_purposes',
-            field=jsonfield.fields.JSONField(default=[], help_text='Allowed session purposes for this group type', max_length=256, validators=[ietf.group.models.JSONForeignKeyListValidator(ietf.name.models.SessionPurposeName)]),
+            field=ietf.utils.db.IETFJSONField(default=[], help_text='Allowed session purposes for this group type', max_length=256, validators=[ietf.utils.validators.JSONForeignKeyListValidator(ietf.name.models.SessionPurposeName)]),
         ),
     ]