Feature/fix non existing data gj

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 3 lines in your changes missing coverage. Please review.

Please upload report for BASE (new_develop@bec3782). Learn more about missing BASE report.

Files	Patch %	Lines
polytope/datacube/backends/fdb.py	0.00%	3 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## new_develop #165 +/- ## ============================================== Coverage ? 81.87% ============================================== Files ? 98 Lines ? 7897 Branches ? 0 ============================================== Hits ? 6466 Misses ? 1431 Partials ? 0 ```

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