-- Identificar registros com UUID inválido
SELECT id, uuid_column
FROM atendimento
WHERE uuid_column !~ '^[0-9a-f]{8}-[0-9a-f]{4}-4[0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$';

-- Atualizar registros com UUID inválido
UPDATE atendimento
SET uuid_column = gen_random_uuid()
WHERE uuid_column !~ '^[0-9a-f]{8}-[0-9a-f]{4}-4[0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$';