[duckdb/#13428] - I deleted SEQUENCE from default value of the table but i can't CREATE OR REPLACE SEQUENCE needs documentation

See https://github.com/duckdb/duckdb/issues/13428

Start with the linked DuckDB issue #13428 and review the existing documentation for CREATE OR REPLACE SEQUENCE and sequence-backed default values. Identify the appropriate DuckDB documentation page, then document the reported behavior and the supported way to create or replace a sequence; done means the linked scenario is clearly explained.

Written by the indexing model from the issue text.