ARBS-23 commented on issue #44309:
URL: https://github.com/apache/superset/issues/44309#issuecomment-5680858052
### Clearer reproduction (Charts)
I found a more reliable way to reproduce the Chart import failure
(`dataset_uuid: Missing data for required field`):
1. Create or open a chart that is linked to a dataset.
2. Delete the **dataset** that the chart depends on (not only the chart).
3. Observe the chart is broken in Explore: **Missing dataset. The dataset
linked to this chart may have been deleted.** (and **Failed to load chart
data**).
4. Export / re-import the chart (or a bulk chart ZIP that includes such
charts).
Import then fails validation on `charts/*.yaml` with:
```json
{"dataset_uuid": ["Missing data for required field."]}
```
The original issue steps (export → delete the chart/dashboard/dataset rows →
re-import) still apply for the bulk restore case. This note clarifies that for
**Charts**, deleting the **linked dataset** is the key trigger for the
`dataset_uuid` missing-field error / broken Explore state before re-import.
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