* Choose an appropriate 'replacer' from the :mod:`anonymizer.replacers` module.
- * For some fields, you will want to remove them from the list of attributes, so
- that the values will be unchanged - especially things like denormalised
+ * For some fields, you will want to specify "SKIP" so that the values will be
+ unchanged - especially things like denormalised fields.
+ Note that you can't just remove from the list. This is to cope with the
+ problem of new fields being added to the model, but the developer forgetting
+ to add the field to the anonymizer. To prevent that situation, every field
+ must listed in the 'attributes' list.
* Some models may not need any anonymization, and the corresponding anonymizer