fix POST setting

backend/website/routes.py

@@ -583,7 +583,7 @@ def admin_settings():
         return get_settings()
     if request.method == 'POST':
         setting = Setting(
-            day=request.json['key'], color_id=request.json['value'])
+            key=request.json['key'], value=request.json['value'])
         try:
             db.session.add(setting)
             db.session.commit()