Modbus RTU, Two Arduino, USB, Overriding port

Hello all.
My system consist of Raspberry and two Arduino nano which i connected using USB cable. I all the time have error: Overriding modbus port /dev/ttyUSB0 by /dev/ttyUSB1
I would want that 2 arduino worked together at the same time. Separately, everything works well. However - there is an error
OpenHab 1.8.3

modbus:poll=10000
modbus:writemultipleregisters=true

modbus:serial.slave1.connection=/dev/ttyUSB0:9600:8:none:1:rtu
modbus:serial.slave1.id=1
#modbus:serial:slave1.valuetype=int16
modbus:serial.slave1.start=0
modbus:serial.slave1.length=6
modbus:serial.slave1.type=holding

modbus:serial.slave2.connection=/dev/ttyUSB1:9600:8:none:1:rtu
modbus:serial.slave2.id=2
#modbus:serial:slave2.valuetype=int16
modbus:serial.slave2.start=0
modbus:serial.slave2.length=6
modbus:serial.slave2.type=holding

Help me please.
I do not understand where the error?

Modbus binding version 1.8.3 is buggy with serial, and your case just does not work there.

Please update the binding to the 1.9.0 version. Download it from here https://openhab.ci.cloudbees.com/job/openHAB1-Addons/ws/bundles/binding/org.openhab.binding.modbus/target/

Best
Sami

I’m talking to you now the words of the famous song about you: you are simply the best… tu tutu tu
I think version 1.7-1.8 openhab have problem with bindings.
You really helped me.
I have questions about the Binding COM ports in Raspberry. I have a problem because my 9 Arduino have SerialNumber. I need to remember all the Arduino. But this question is not for this topic. Thank you хороша людина!
When I finish my project I will share with you information