Cannot update trigger prototype, cannot be moved to another template or host.

[yurtesen]

On Zabbix 6.0.x. I have a trigger (this trigger works)

min(/Template Apache Tomcat by Zabbix agent active/catalina.threadpool[{#JMXNAME},currentThreadsBusy],5m)>(last(/Template Apache Tomcat by Zabbix agent active/catalina.threadpool[{#JMXNAME},maxThreads])*{$TOMCAT.THREADS.PBUSY.WARN})

This works fine, except in some cases `maxThreads` can be `-1` (when `maxThreads` is not used)

https://tomcat.apache.org/tomcat-9.0-doc/config/http.html

I am trying to change it so it won't trigger if `maxThreads` are less than 0.

last(/Template Apache Tomcat by Zabbix agent active/catalina.threadpool[{#JMXNAME},maxThreads])>0
and
min(/Template Apache Tomcat by Zabbix agent active/catalina.threadpool[{#JMXNAME},currentThreadsBusy],5m)>(last(/Template Apache Tomcat by Zabbix agent active/catalina.threadpool[{#JMXNAME},maxThreads])*{$TOMCAT.THREADS.PBUSY.WARN})

actually it won't even accept something like

last(/Template Apache Tomcat by Zabbix agent active/catalina.threadpool[{#JMXNAME},maxThreads])>0

It always gives error:

Cannot update trigger prototype "{#JMXNAME}: currentThreadsBusy> maxThreads * {$TOMCAT.THREADS.PBUSY.WARN} for over 5m": trigger prototype cannot be moved to another template or host.

Why not?

[yurtesen]

I cloned the trigger and miraculously the expression is accepted. I guess it is a sort of bug, but I am not sure how to reproduce it. So it is hard to make a bug report.