Hi Ralf:

> Do you have a postgres backend?
> This may be a backend-specific error we do not catch.

I do not. It's sqlite, which is more ... shall we say forgiving on typing issues.

Since you can reproduce with the current development, it's reasonable to think
its related to a postgres backend with psycopg2. IIRC there were some changes to the
exception structure in psycopg2.

InvalidTextRepresentation is a subtype of DataError:

 https://www.psycopg.org/docs/errors.html