Poster does not auto-fill out form when you add unlike talks

If you add a talk from the pub page:

<img width="2105" height="1162" alt="Image" src="https://github.com/user-attachments/assets/2833b74e-9ed6-4e6e-bf63-42a0bb084ca7" />

But if you add a poster, it doesn't auto-fill:

<img width="2308" height="1186" alt="Image" src="https://github.com/user-attachments/assets/59b30715-89fa-49f1-9628-ab813e419695" />