cancel the command result alarm

I need to send command to devices , but i need to cancel the command result notification temporary so the end users will not see the notification . how can i do that ?
I am trying to use the computed attributes , to set the alarm = null , or result = null , but the notification still triggered.

Setting result to null should do it.

Many thanks anton
I did it but still the notification triggered.

attribute = Command Result
Expression = if((protocol??"")=="gt06" && !(result ?? "").toLowerCase().contains("restore")) null

Your expression seems too complicated and I'm not sure it's correct.

i have tried to set it null directly , and even didnt work
attribute = Command Result
Expression =null

There must be something you're missing. Have you linked the attribute to the device? Are you sure the key is correct?

the computed attribute is linked with device directly , and the Key (attribute) i selected from drop down list (Command Result ) which = reslut after i save the computed attribute in the list

And you waited for new data?

Simply i test by send command to device , then i got the notification , and in the positions report i see the result value , the computed attribute did not cancel the notification triggering and did not remove the result

And you're using the latest official release?