UPDATE TBFIREBIRD_ADMIN_DB SET 
    PRINCIPAL = 1   
WHERE DB = '/opt/firebird/data/kayros/GC.fdb'
AND DESCRICAO = 'KAYROS';

UPDATE TBFIREBIRD_ADMIN_DB SET
    PRINCIPAL = 0
WHERE DB <> '/opt/firebird/data/kayros/GC.fdb'
AND DESCRICAO <> 'KAYROS';