MySQL Error Occurred

Error Message:
145: Table './woolsworldwideco/Wools_CubeCart_sessions' is marked as crashed and should be repaired

SQL:
SELECT * FROM Wools_CubeCart_sessions LEFT JOIN Wools_CubeCart_customer ON Wools_CubeCart_sessions.customer_id = Wools_CubeCart_customer.customer_id WHERE sessId = ''