Can not use a ‘priority-rat = key_word’?

Somebody advised to me ‘priority-rat = key_word’
if bot sees a rat on overview with key_word in its name, it should kill it with higher priority.

However, the following error message was displayed.

Failed to parse these app-setting: Unknown setting name ‘priority-rat’.

I want use a ‘priority-rat = Alvi’

You can use the priority-rat setting here: FrontendWeb.Main

There is a new development regarding the prioritization of rats in anomaly bots. The addition of such a prioritization has become more popular recently, so I now include it in the reference example bot for anomaly ratting.
Here is the latest version of the recommended example for anomaly ratting in EVE Online: https://catalog.botlab.org/f3e0387c82

You can use it by adding lines like the following to your bot prompt:

prioritize-rat = Agent
prioritize-rat = Spy
prioritize-rat = Initiate