Question juridique clé
Whether the challenge to the final 2016/2012 EL ruling could still be examined in these proceedings
Solution extraite
No. The earlier judgment was final and could no longer be reopened or reviewed here; the renewed request for back payment could not be addressed on the merits.
Motifs extraits
The prior decision had been duly served and became formally final; the court therefore lacked scope to reconsider it in this appeal against the 2019 recalculation.