Under a hosts discovery tab it is possible to execute discovery rules.

If you try to execute a rule of type "Zabbix agent (active)" the following message is shown:

Cannot send request: wrong discovery rule type.

This leads the user to question if the discovery rule is incorrect or broken some way and can lead to unneccessary time wasted trying to modify it when he would just have to wait for the discovery to execute automaticaly.

It would be more useful if the message said:

Cannot send request: active discovery rules can not be executed manually

Even better would be if trying to execute such a rule would offer to temporarily shorten the discovery time for example to a few minutes.