97In addition, the requirement to interpret national law in conformity with EU law includes the obligation, on national courts, including those ruling as courts of last instance, to change their established case-law where necessary if that case-law is based on an interpretation of national law that is incompatible with EU law. Consequently, a national court cannot validly claim that it is impossible for it to interpret a provision of national law in a manner that is consistent with EU law merely because that provision has been interpreted by other courts in a manner that is incompatible with EU law or is applied in such a manner by the relevant national authorities (see, to that effect, judgment of 4 March 2020, Telecom Italia, C‑34/19, EU:C:2020:148, paragraphs 60 and 61 and the case-law cited).
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