Problems with availability in other languages when manually book a room

Hi, my client needs to book some rooms manually and she is doing this direct on the admin.

But when she check the availability in the other two languages, the rooms still available. The site has three languages and uses the WPML.

What is the best way to book certain dates manually and how can she make this for all languages?

Is really necessary to enter each language and book again?

The plugin version is 1.9.7.1

Thanks,
Fernanda