How to use 2 NodeMCU to one node-red?

hallo, can someone help me?
i want use 2 NodeMCU in one node-red, when i use one by one my nodemcu, its worked.
but when i combine my nodeMCU it's not worked worked, just one cencor read.
my flow like this and i make it in raspberry.
the dashboard like this, and not read new value:
i try to make solution, i make 2 nodeMCU to sending the data string in debug node-red and it's worked, like this:

so i try to connect the cencor again, but it's not worked.
can some help me?
thank you, regards

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