Zabbix update using API error "Incorrect trigger expression"

[hiad]

Hello Team!
Im working in an update trigger prototype, i'm not able to update using API zabbix

Initial Expression:
{14342}>0 and ({14343})>({14342})*0.8

I'm only changing the number in the end of the expression but Zabbix response me:

error :

code:-32602
data:"Incorrect trigger expression. Check expression part starting from "{14401}>0 and ({14402})>({14401})*0.33"."
message:"Invalid params."

[DmitryL]

Hello hiad,

Please show us your API call code.

[hiad]

Hello Guys,

It's angular :

updatePrototype: function (id, expression, description) {
return $http.post(GlobalVars.api_url(), {
jsonrpc: "2.0",
id: $rootScope.auth_id,
auth: $rootScope.auth,
method: 'triggerprototype.update',
params: {
triggerid: id,
expression: expression,
description: description
}

});
}



Error:

Incorrect item key "if.speed["-d","ip","-c","reallinx","-s","{#SNMPINDEX}"]" provided for trigger expression on "host".


About this error , i want to add that if i didn't change the expression. It always will show me the error. The description is updating correctly.