Refactor this method to reduce its Cognitive Complexity from 20 to the 15 allowed.

try {
        String conversationId = kakaoMessageFlowService.open(kakaoMessage.getKakaoUser().getSenderKey());
        if (StringUtils.isNotEmpty(conversationId)) {
            activeKakaoFlowService.register(activeKakaoKey, kakaoMessage.toConversationDomain(conversationId));
        }
    } catch (Exception e) {
        if (e instanceof DataIntegrityViolationException
            || e instanceof ResourceAlreadyExistsException) {
            for (int i = 0; i < 3; i++) {
                log.warn("ActiveKakao DuplicateKeyException occurred. - retrying.." + activeKakaoKey);
                Optional<KakaoRdo> kakaoRdo = findAllByUserStatus(kakaoMessage.getKakaoUser());
                if (kakaoRdo.isPresent()) {
                    break;
                }
                try {
                    Thread.sleep(500L);
                } catch (Exception ex) {
                    log.error(ExceptionUtils.getStackTrace(e));
                }
            }
        } else {
            try {
                activeKakaoFlowService.remove(activeKakaoKey);
            } catch (Exception ex) {
                log.warn(e.getMessage());
            }
        }
  }

문제 : 인지 복잡도가 높아서 문제 (빨간색 block된 부분) - 총 20개의 복잡도 발생한 코드

해결: instanceof로 익셉션 구분한 부분을 catch로 올림

} catch (DataIntegrityViolationException
            | ResourceAlreadyExistsException e) {
            
} catch (Exception ex) {

}