Constraints between this room and your reservations/limit booking records in database

I am experimenting with Solidres using the sample data. When I try to delete some of the rooms - e.g. Room X004 in the type 'Superior' I get this message:
"There are constraints between this room and your reservations/limit booking records in database. Do you want to remove this room and all related constraints too? Yes/No"
But there is no explanation as to what this means or what will happen if I say 'yes' or 'no'.

Can someone explain, please? I only have the basic, free component at the moment so I do not have the 'Limit Booking' plugin installed.

Thank you.

This never got answered, but I came across the same issue today. Could you explain this message please?

@GillianS
as the message mention, it is because the reservations/limit booking records in database are using the Room datas you want delete.

Before to delete a Room you have to check and delete datas in this order:
A - Reservations (of the Room)
B - Room Tariff (of the Room)
C - Room