diff --git a/CHANGELOG.md b/CHANGELOG.md
index e0fb8c4e..218a97ca 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 ml).
 
 ## testing
+- [added] #312 Placeholder: new, edit, update. (manually and with excel).
 
 ## [2.3.0] - 2022-07-12
 - [added] #281 Add selenium test.
diff --git a/examples/app.py b/examples/app.py
index 690ff9f9..de4375c5 100644
--- a/examples/app.py
+++ b/examples/app.py
@@ -41,10 +41,10 @@ app.register_blueprint(workbench)
 # configure & enable CSRF of Flask-WTF
 # NOTE: enable by blueprint to exclude API views
 # TODO(@slamora: enable by default & exclude API views when decouple of Teal is completed
-csrf = CSRFProtect(app)
+# csrf = CSRFProtect(app)
 # csrf.protect(core)
 # csrf.protect(devices)
-app.config["SQLALCHEMY_RECORD_QUERIES"] = True
-app.config['PROFILE'] = True
-app.wsgi_app = ProfilerMiddleware(app.wsgi_app, restrictions=[30])
-app.run(debug=True)
+# app.config["SQLALCHEMY_RECORD_QUERIES"] = True
+# app.config['PROFILE'] = True
+# app.wsgi_app = ProfilerMiddleware(app.wsgi_app, restrictions=[30])
+# app.run(debug=True)