Athens (dpa) - Turkish President Recep Tayyip Erdogan says that a nearly century-old peace agreement between his country and Greece, which also regulates their contested spheres of sovereignty in the Aegean Sea, needs to be updated.Erdogan, on a two-day visit to Athens, also complained that ethnic Turks in western Thrace - partly located in modern north-eastern Greece - are not allowed to pick their own religious leaders under the treaty.Greek President Prokopis Pavlopoulos said that the peace treaty of Lausanne, signed in 1923, defines the borders of Greece and the EU frontier and was not negotiable for Athens.dpa tt shg bb rmo