[Yandex Cloud documentation](../../../index.md) > [Yandex DataLens](../../index.md) > Troubleshooting > Unknown referenced source column

# [Yandex DataLens] Unknown referenced source column

`ERR.DS_API.FORMULA.UNKNOWN_SOURCE_COLUMN`

The field references the column that is missing from the source. Probably, the column existed before but was deleted.

If it exists in the data source but is not recognized by the dataset, [update the fields](../../dataset/create-dataset.md#update-fields).