You didn't have to create a new Steam account just because you changed regions. https://help.steampowered.com/en/faqs/view/2B3F-DAEF-846B-A0E8 Unfortunately, if you already disabled Cross-Save, you must wait out the 90-day lockout; there are no exceptions. After the lockout is over, you can reenable Cross-Save with your already-existing Steam ID, or you can create a new one and use it.