What does the message "Sanctioned: Block all actions in all entities" mean?

Economic sanctions may be imposed by one country upon another and these sanctions may include restrictions on financial transactions including the purchase, sale and transfer of sanctioned securities. In the event an account holder attempts to trade or transfer sanctioned securities, the transaction will be blocked. Note that these blocks will remain in place until such time as the sanctions are lifted by the issuing country and may prevent the account holder from closing a position acquired before the sanction was imposed. IBKR has no authority to override restrictions imposed by sanctions.

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