badger: Invalid value pointer offset: 1659 greater than current offset: 0

I’m getting an error while iterating my data: Invalid value pointer offset: 1659 greater than current offset: 0

Further Tests:

• db.Backup() leads to Invalid value pointer offset: 1659 greater than current offset: 746
• db.PurgeOlderVersions() runs but does not help

Feels like the value log is corrupted or something. Is there any preferred way to recover from this?

Here is my Database (only 16MB): https://files.lobaro.com/index.php/s/xWXphXDnNYRF0BN

My Code:

func iterateData(db *badger.DB, cb func(*model.Data) error) error {
	err := db.View(func(txn *badger.Txn) error {
		it := txn.NewIterator(badger.DefaultIteratorOptions)
		defer it.Close()
		prefix := []byte(PREFIX_DATA)
		for it.Seek(prefix); it.ValidForPrefix(prefix); it.Next() {
			item := it.Item()
			k := item.Key()
			v, err := item.Value()
			if err != nil {
				return err // Error appears here
			}

			entity := &model.Data{}
			err = json.Unmarshal(v, entity)
			if err != nil {
				logrus.WithError(err).WithField("key", string(k)).Warn("Failed to unmarshal channel")
			} else {
				err := cb(entity)
				if err != nil {
					return err
				}
			}
		}
		return nil
	})

	return err
}