ValueError: Assertion error - expected most recent record to be last edited

This has happened 43 times over the last 4 years

View details in Rollbar: [https://app.rollbar.com/a/jimmy.andrews/fix/item/VariantGrid/3417](https://app.rollbar.com/a/jimmy.andrews/fix/item/VariantGrid/3417)

```
Traceback (most recent call last):
File "/data/variantgrid/classification/views/classification_view.py", line 276, in insert
raise ValueError('Assertion error - expected most recent record to be last edited')
ValueError: Assertion error - expected most recent record to be last edited
```

Code context is:

```
recent_modifications = list(ClassificationModification.objects.filter(classification=record.id).order_by('-created')[:2])
resolution = 'closed'
if recent_modifications:
latest_mod = recent_modifications[0]
if not latest_mod.is_last_edited:
raise ValueError('Assertion error - expected most recent record to be last edited')
```