49Second, although the obligation to interpret national law in a manner consistent with EU law cannot serve as the basis for an interpretation of national law contra legem (see, inter alia, judgment of 15 April 2008, Impact, C‑268/06, EU:C:2008:223, paragraph 100 and the case-law cited), national courts must alter their established case-law, where necessary, if it is based on an interpretation of national law that is incompatible with the objectives of a directive (judgments of 19 April 2016, DI, C‑441/14, EU:C:2016:278, paragraph 33; of 17 April 2018, Egenberger, C‑414/16, EU:C:2018:257, paragraph 72; and of 11 September 2018, IR, C‑68/17, EU:C:2018:696, paragraph 64).
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