Magento2 – Exception occurs when I update customer data using customer repository

Error:
Invalid value of UK provided for the countryId field.

Error File:
vendor\magento\module-customer\Model\ResourceModel\AddressRepository.php

Error line:
133

Code is:

$customer = $this->customerRepository->getById($customer->getId());
$cattrValue = $customer->getCustomAttribute('username');
$customer->setCustomAttribute('username', $customerData['web_username']);

$customer->setFirstname($customerData['first_name']);
$customer->setLastname($customerData['last_name']);

$this->customerRepository->save($customer, $hashedPassword);