41As the Court has previously stated, according to recitals 4 and 45 of Regulation No 883/2004, the purpose of that regulation is to coordinate Member States’ social security systems in order to guarantee that the right to free movement of persons can be exercised effectively. That regulation modernised and simplified the rules contained in Regulation No 1408/71, while retaining the same objective as the latter (see, to that effect, judgment of 21 March 2018, Klein Schiphorst, C‑551/16, EU:C:2018:200, paragraph 31).
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