Instead, while Harsiese A was certainly an independent king at Thebes during the first decade of Osorkon II's kingship, he was a different person from a second person who was also called Harsiese: Harsiese B.
This means that the High Priest Harsiese mentioned on statue CGC 42225 must be the second Harsiese: Harsiese B.
Each faction had a rival line of High Priests of Amun with Pedubast's being Harsiese B who is attested in office as early as Year 6 of Shoshenq III and then Takelot E who appears in office from Year 23 of Pedubast I. Osorkon B was Pedubast I and Harsiese's chief rival.
Harsiese B | Harsiese A |