92In all circumstances, according to the Court’s established case-law, it is the party seeking to establish the European Union’s non-contractual liability that must adduce conclusive proof as to the existence and extent of the damage it alleges and as to the existence of a sufficiently direct causal nexus between the conduct of the institution concerned and the damage alleged (judgment of 20 December 2017, EUIPO v European Dynamics Luxembourg and Others, C‑677/15 P, EU:C:2017:998, paragraph 100 and the case-law cited).
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