Error in executable model generation when trying to bind an enum value

Issue

Building rules written in MVEL dialect and trying to bind an enum value with executable rule model enabled causes an error.

When I build a maven project which contains rules trying to bind an enum value like (*1) with executable model enabled,

package com.example.reproducer

import com.example.reproducer.Bus

dialect "mvel"

rule "bus2"
   when
       $bus : Bus( $maker : Bus.Maker.HINO )    // ..... (*1)
   then
       System.out.println("bus=" + $bus + ", maker=" + $maker);
end

// Maker.HINO is an enum value declared in Bus class.

build error occurs with the message like below.

$ mvn clean compile -DgenerateModel=YES
...
[ERROR] Failed to execute goal org.kie:kie-maven-plugin:7.44.0.Final-redhat-00003:generateModel (default-generateModel) on project your_project: Execution default-generateModel of goal org.kie:kie-maven-plugin:7.44.0.Final-redhat-00003:generateModel failed.: CannotConvertException -> [Help 1]
...