IF 2022 was not the first year of your 50% ownership, you can't change it. Otherwise, it completely messes up a number of things, including depreciation and depreciation history. If you had 50% ownership and now have 100% ownership in 2022, you simply enter the other 50% of the property as a new asset for that property, indicating your actual acquisition of that additional 50% on whatever date in 2022 to acquired it.