Yes, you will have to file a Part-Year California and Part-Year Pennsylvania tax return. You will report the income you earned in California to California and the income you earned while you were working in Pennsylvania to Pennsylvania.
You MAY be able to argue that you did not intend to establish Pennsylvania residency until 2025 (if you had supporting evidence); but unfortunately, you would still be required to file a nonresident Pennsylvania tax return because you worked in Pennsylvania.
**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"