Hello. It means your SEED phrase has been imported incorrectly. Kindly check the following guide which describes the situation in detail https://docs.wavesplatform.com/en/waves-client/frequently-asked-questions-faq/account-management/one-seed.html
Also, bear in mind that Lite Client is out of date and currently we recommend all our users to install a Desktop Client for their OS here https://wavesplatform.com/products-exchange

Sincerely,
Waves Community Manager