But these studies say different things, for example in the first one we read:
We detect definitive evidence of Iranian-related ancestry in an Iron Age Sardinian I10366 (391-209 calBCE) with an estimate of 11.9 ± 3.7.% Iran_Ganj_Dareh_Neolithic related ancestry.
In the Sardinian_LateAntiquity group (the earliest dating to 256-403 calCE), we detect even higher proportions of Iran_Ganj_Dareh_Neolithic-related ancestry: an estimated 29.6 ± 4.6.%.
We detect Iranian-related ancestry in Sicily by the Middle Bronze Age 1800-1500 BCE, consistent with the directional shift of these individuals toward Mycenaeans in PCA (Fig. 2b). Specifically, two of the Middle Bronze Age individuals can only be fit with models that in addition to Anatolia_Neolithic and WHG, include Iran_Ganj_Dareh_Neolithic.