Cant populate create LLD Trapper with trapper values

[TubberX]

Hello
Im monitoring nifi flow with logstash and zabbix. WIth a zabbix_trapper Im able to create a item but when a value is sent it is rejected.

Using a proxy to send our matrics. Can create it with

[B]zabbix_sender -v -z localhost -p 10051 -s 'PD - NIFI FLOW HEALTH' -k 'NIFI.[Flow.Error]' -o '{"data":[{"{#NIFIPROC}":6,"{#PROCID}":6}]}' [/B]

and get

NIFI Flow Error discover: NIFI Flow 6 Error on 6 NIFI.[6] 0 365d Zabbix trapper

zabbix_sender -vv -z localhost -p 10051 -s "PD - NIFI FLOW HEALTH" -k 'NIFI.[6]' -o 0

[B]zabbix_sender [218293]: DEBUG: answer [{"response":"success","info":"processed: 0; failed: 1; total: 1; seconds spent: 0.000020"}]
Response from "localhost:10051": "processed: 0; failed: 1; total: 1; seconds spent: 0.000020"
sent: 1; skipped: 0; total: 1[/B]

And it fails

What am I missing? Proxy has received the item config from zabbix server