Custom exception not giving correct message, spring?

I have added customexception class to handle my api class.

Exception class

@SuppressWarnings({ "unchecked", "rawtypes" })
@ControllerAdvice
public class ApiExceptionHandler extends ResponseEntityExceptionHandler {

@ExceptionHandler(Exception.class)
public final ResponseEntity<Object> handleAllExceptions(Exception ex, WebRequest request) {
	List<String> details = new ArrayList<>();
	details.add(ex.getLocalizedMessage());
	ErrorMessage error = new ErrorMessage("Server Error", details);
	return new ResponseEntity(error, HttpStatus.INTERNAL_SERVER_ERROR);
}

@ExceptionHandler(RecordNotFoundException.class)
public final ResponseEntity<Object> handleConfigNotFoundException(RecordNotFoundException ex, WebRequest request) {
	List<String> details = new ArrayList<>();
	details.add(ex.getLocalizedMessage());
	ErrorMessage error = new ErrorMessage("Record Not Found", details);
	return new ResponseEntity(error, HttpStatus.NOT_FOUND);
}

@Override
protected ResponseEntity<Object> handleMethodArgumentNotValid(MethodArgumentNotValidException ex,
		HttpHeaders headers, HttpStatus status, WebRequest request) {
	List<String> details = new ArrayList<>();
	for (ObjectError error : ex.getBindingResult().getAllErrors()) {
		details.add(error.getDefaultMessage());
	}
	ErrorMessage error = new ErrorMessage("Validation Failed", details);
	return new ResponseEntity(error, HttpStatus.BAD_REQUEST);
}
}

API method

	@RequestMapping(value = "/config", params = { "appCode", "appVersion" }, method = RequestMethod.GET)
public ResponseEntity<ConfigResponse> getConfig(@RequestParam(value = "appCode", required = true) String appCode,
		@RequestParam(value = "appVersion", required = true) String appVersion) {
	List<AppConfig> result = configRepository.findByCodeAndVersion(appCode, appVersion);
	if (result.isEmpty()) {
		throw new RecordNotFoundException(appCode + " or " + appVersion + "does not exist");
	}

	AppConfig config = new AppConfig();
	return new ResponseEntity<ConfigResponse>(config.convertToResponse(result), HttpStatus.OK);

}

Record Not found

@ResponseStatus(HttpStatus.NOT_FOUND)
public class RecordNotFoundException extends RuntimeException {
public RecordNotFoundException(String exception) {
	super(exception);
}
}

I am checking for the record not found but it still gives me the spring exception and not my custom exception.