46As the Court has repeatedly held, the aim of Articles 45 TFEU and 48 TFEU would not be achieved if, as a consequence of the exercise of their right to freedom of movement, migrant workers were to lose the social security advantages afforded them by the legislation of one Member State, especially where those advantages represent the counterpart of contributions which they have paid (see, inter alia, case 24/75 Petroni [1975] ECR 1149, paragraph 13, and da Silva Martins, paragraph 74 and the case-law cited).
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