fluid to fluid heat exchanger

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Hello I am a thesis student working in OS 3.1.0. We have by comparing the fluid heat exchanger with an other student something very strange detected.

Our fluid heat exchanger is different from theirs but we use the same object, how is this possible? the other student is working in OS 3.0.0

As you can see in the pictures (in yellow and red circles) the differences between the objects. As you can see in the pictures we cannot change the important fields:

1) loop demand side inlet/outlet node = (yellow)

2) heat exchanger setpoint node name = (red)

The other student (3.0.0)

our object heat exchanger

Does someone know how this is possible?