db.schema.epsg_code does not work for old sqlites

[jpprins1]

In [10]: db = ThreediDatabase("noordpolder.sqlite")
In [11]: db.schema.epsg_code

OperationalError: (sqlite3.OperationalError) no such table: boundary_condition_1d
[SQL: SELECT ST_SRID(boundary_condition_1d.geom) AS "ST_SRID_1"
FROM boundary_condition_1d]
(Background on this error at: https://sqlalche.me/e/20/e3q8)

Probably due to missing v2_ prefix. Either we need to make this work properly or raise a (custom) exception in case of old sqlites.