duplicate_schema Duplicate Schema — SQLSTATE 42P06

A schema with that name already exists.

• The error is written to the server log and returned to the client carrying SQLSTATE 42P06.
• Any driver (libpq, JDBC, psycopg, npgsql, pgx) surfaces this code in its error object so you can branch on it programmatically.
• PL/pgSQL can trap it by name: EXCEPTION WHEN duplicate_schema THEN.

Severity: ERROR  |  PostgreSQL versions: 12, 13, 14, 15, 16, 17

Reproduce with the exact statement and read the full message in the server log (raise log_min_messages / set log_min_error_statement for more context).

CREATE SCHEMA targets an existing name.

Steps to resolve 42P06:

1. Use CREATE SCHEMA IF NOT EXISTS or choose a different name.

Reference: PostgreSQL error codes — Class 42 (Syntax Error or Access Rule Violation).