ALTER TABLE vn.entry CHANGE `ref` invoiceNumber varchar(50) CHARACTER SET utf8mb3 COLLATE utf8mb3_unicode_ci DEFAULT NULL NULL; 
ALTER TABLE vn.entry ADD reference varchar(50) NULL COMMENT 'Referencia para eti';
ALTER TABLE vn.entry ADD ref VARCHAR(50) GENERATED ALWAYS AS (invoiceNumber) VIRTUAL COMMENT 'Columna virtual provisional para Salix'; 