When attempting to create a new hardware asset post Orlando upgrade, you are unable to create new models for hardware assets. The "New" button that used to be present before Orlando release is no longer present
Orlando and upwards
In the reference list when trying to create a new model from an asset record, there was a defect where we could not open the manufacturer reference window to choose a manufacturer as we do not support two layers of reference windows.
So in order to fix this, a decision has been taken in Orlando release to remove the "New" button on cmdb models reference lists. That's the reason we are not seeing the new button.