Can't update custom values of a field anymore

Custom mapping not an option anymore

For this specific field we used to have custom mappings of integers to a human readable status. Up until last week this worked and it still works on certain fields in other tables.

But for this field, the "custom mapping" doesn't show up anymore in the drop down.
How can we get this back?

Diagnostics

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hi, the field you want to use custom mapping in needs to be an integer (as the base type). Have you checked that already?