Reservations and deactivating the pass

Hi,

Will my seat reservation be still valid if I deactivate the pass after purchasing it, and then activate the pass again? I will be getting a new ID soon and thus I will need to deactivate my pass to update it. However, I want to make seat reservations as soon as possible as they might be sold out after I have got a new ID, and that’s something I’d like to avoid. Can I purchase the seat reservations before I deactivate the pass, or should I wait until I get the new document and buy them only after my pass has been activated “for good”? 

Note: I got my ticket from DiscoverEU, so I had to activate it before the end of March. They told me it’s completely fine to deactivate it to update my ID afterwards, but I have no idea what happens to my seat reservations then.