CREATE EXTENSION IF NOT EXISTS anon CASCADE; SELECT anon.start_dynamic_masking(); CREATE TABLE t1 ( id TEXT, name TEXT, creditcard TEXT, fk_compx TEXT --remove 'x' will fix the problem ); -- remove one the 2 comments will fix the problem COMMENT ON COLUMN t1.name IS ' MASKED WITH FUNCTION anon.random_last_name() '; COMMENT ON COLUMN t1.creditcard IS ' MASKED WITH FUNCTION anon.random_string(12)'; CREATE TABLE "T2" ( id_company SERIAL, -- change SERIAL to TEXT will fix the problem "I" TEXT, -- change "I" to i will fix the problem COMPANY TEXT ); -- CLEAN DROP TABLE "T2" CASCADE; DROP TABLE t1 CASCADE; DROP EXTENSION anon CASCADE;