 
 CREATE TABLE concept_stage
 (
+   concept_id         NUMBER,
    concept_name       VARCHAR2 (256),
    domain_id          VARCHAR (200),
    vocabulary_id      VARCHAR (20) NOT NULL,

  LANGUAGE_CONCEPT_ID  NUMBER
)
;
-- Create FKs

ALTER TABLE concept ADD CONSTRAINT xpk_concept PRIMARY KEY (concept_id);

-- Create tables

CREATE TABLE concept_synonym (
  concept_id            INTEGER            NOT NULL,
