94That conclusion cannot be invalidated by the fact that that court has adopted a decision having the force of res judicata. It should be emphasised that the rule of exclusive competence of the Commission is necessary in the internal legal order as a consequence of the principle of the primacy of Union law (see, to that effect, judgment of 18 July 2007, Lucchini, C‑119/05, EU:C:2007:434, paragraph 62).
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