Unknown photo is on our page

Dear Booking.com Help Center Team,

Hello, this is Elsie Lim from Hilton Busan, South Korea.

We have found out a weird photo on our Hilton Busan page on Booking.com.

For more details, please check the below photo attached.

When we log-in to extranet, we can't find this photo because this photo is not uploaded by us.

How can we delete it?