idle nurses. how do I make them work?

I am doing an event. I have two orthopaedic patients both in the traumatic centres. They need to go to either HDU or Regular hospitalization before their surgeries. I initially chose to send them to Regular Hospitalization without checking that there are no free beds there. It turns out that I have free beds in HDU, but not in Regular Hospitalization. However, the Regular Hospitalization has been activated and changed its status colour to yellow. As soon as I realised it, I clicked the HDU, but the nurses are idle for hours. I am pressed with time. I wish I could cancel the Regular Hospitalization, but I guess that cannot happen. Bottom line:

1. I want to send my patients to HDU from the traumatic centres.
2. Nurses are idle, so the patients are wasting their time in the TC.
3. When I waited for the regular hospitalization to be available, I did not have enough time left for the treatment for both patients.

Please advise. Thank you.

The nurses can't transport the patients if there are no beds. Transfer two patients already in regular hospitalisation somewhere else - either HDU, or ICU in a pinch, or even another department - this will enable the patients in the trauma centre to come up to ortho regular hospitalisation, then be transferred to HDU