inserting data from generate_series into motherduck table returns error

[wuputah]

Description

Given:

CREATE TABLE md (i integer) USING duckdb;

An insert using generate_series call will fail as follows:

INSERT INTO md SELECT generate_series(1, 1000);

ERROR:  (PGDuckDB/Duckdb_ExecCustomScan) Conversion Error: Unimplemented type for cast (BIGINT[] -> INTEGER)
LINE 1: INSERT INTO my_db.main.md (i) SELECT generate_series(1, 1000) AS generate...

Most likely, this would have to be fixed in duckdb itself, since I think this is a mismatch between Postgres and DuckDB behavior, but posting here first.