1Wire Sensor ID keeps changing - No w1_slave file

[SOswald]

I have a Neuron with a 1-Wire DS18B20 temp sensor.

When I look in the /sys/bus/w1/devices folder, I see this:

I am using Node-Red to test and, and this is the error message I get:

What am I missing? As I try different things, the ID in the devices folder changes. I am new to this environment, but not new to development.

Thanks!