To update a household in Sims 4 Tray Importer and remove broken custom content, you can follow these steps:
1. Open Sims 4 Tray Importer on your Windows computer.
2. Select the household you want to update from the list.
3. Click on the "CC" tab to view the custom content associated with that household.
4. Identify the broken custom content items you want to remove.
5. Right-click on each broken item and select "Remove selected".
6. Save the changes by clicking on the "Save" button.
7. Once the broken custom content is removed, you can try loading the household again, and it should not show the old clothing anymore.