Katalog von Photoshop 2025 auf 2026 übertragen

When you first launched the Organizer, you were given the option to convert the catalog automatically.  If you did not accept that option (it is easy to miss), go to File>Manage Catalogs and click the Convert button.  If your 2025 catalog is in the default location, select it in the box and click Convert again. 

Be patient and wait until you get a message that the conversion has been completed.

Let me know if you need more detailed instructions.