IR829 RS485 Serial port configuration

[Ramakrishna envision]

 I have just tried configuring IR829 RS485 (Modbus Serial Port) with following manual as reference,But i am getting some error related to line Propagation configuration , i have attached the Running-config and error screenshot, why i am getting this error

How to remove line "no " command is not working, how to use no form

https://www.cisco.com/c/en/us/td/docs/routers/access/800/829/hardware/install/guide/b_IR829-HIG.pdf 

[gauraaga · Accepted solution]

Please use the following command:

no relay line 1 1/5
no relay line 2 1/6

This will help release the lines which you can then use.