Case T-171/22: Judgment of the General Court of 6 September 2023 — OR and OS v Commission (Civil service — Officials — Retirement pension — Pension rights acquired before entry into the service of the European Union — Transfer to the EU scheme — Period of less than 10 years’ service — Death — Refusal to repay capital representing national pension rights transferred and pension rights acquired in the PSEUI — Article 11(1) and Article 12(1)(b) of Annex VIII to the Staff Regulations — Unjust enrichment)