IllegalStateException: Currently we cannot modify something that has mixed stated and justified equal objects

@Test
public void testUpdateLogicalEvent() {
    KieSession session = ...

    AtomicInteger positive = new AtomicInteger(1);
    
    session.insert(new AtomicInteger(-1));
    session.fireAllRules();
    session.insert(positive);
    session.fireAllRules();
    session.insert(new AdminEvent("update logical event"));
    session.fireAllRules();
    
    assertEquals(1, positive.get());
}

public static class Event {
    private String message;
    
    public Event(String message) {
        this.message = message;
    }
    
    public String getMessage() {
        return message;
    }
    
    public void setMessage(String message) {
        this.message = message;
    }
    
    @Override
    public boolean equals(Object obj) {
        return reflectionEquals(this, obj, false);
    }
    
    @Override
    public int hashCode() {
        return reflectionHashCode(this, false);
    }
}

public static class AdminEvent {
    private String message;
    
    public AdminEvent(String message) {
        this.message = message;
    }
    
    public String getMessage() {
        return message;
    }
    
    public void setMessage(String message) {
        this.message = message;
    }
}

dialect 'mvel'

import java.util.concurrent.atomic.AtomicInteger
import ...Event
import ...AdminEvent

rule 'negative integer'
    when
        $int: AtomicInteger(intValue < 0)
    then
        insertLogical(new Event("negative integer"))
end

rule 'increment positive if no negative values'
    when
        $positive: AtomicInteger(intValue > 0)
        not Event()
    then
        $positive.incrementAndGet();
end

rule 'update logical event'
    when
        AdminEvent(message == 'update logical event')
        $event: Event()
    then
        $event.setMessage("Updated logical event");
        update($event);
end

Exception executing consequence for rule "update logical event" in org.droolsassert: [Error: drools.update($event, new org.drools.core.util.bitmask.LongBitMask(2L), org.droolsassert.LogicalEventsTest.Event.class): Currently we cannot modify something that has mixed stated and justified equal objects. Rule update logical event attempted an illegal operation]
[Near : {... $event.setMessage("Updated log ....}]
             ^
[Line: 1, Column: 1]
    at org.drools.core.runtime.rule.impl.DefaultConsequenceExceptionHandler.handleException(DefaultConsequenceExceptionHandler.java:39)
    at org.drools.core.common.DefaultAgenda.handleException(DefaultAgenda.java:1291)
    at org.drools.core.phreak.RuleExecutor.innerFireActivation(RuleExecutor.java:439)
    at org.drools.core.phreak.RuleExecutor.fireActivation(RuleExecutor.java:380)
    at org.drools.core.phreak.RuleExecutor.fire(RuleExecutor.java:136)
    at org.drools.core.phreak.RuleExecutor.evaluateNetworkAndFire(RuleExecutor.java:89)
    at org.drools.core.concurrent.AbstractRuleEvaluator.internalEvaluateAndFire(AbstractRuleEvaluator.java:34)
    at org.drools.core.concurrent.SequentialRuleEvaluator.evaluateAndFire(SequentialRuleEvaluator.java:43)
    at org.drools.core.common.DefaultAgenda.fireLoop(DefaultAgenda.java:1101)
    at org.drools.core.common.DefaultAgenda.internalFireAllRules(DefaultAgenda.java:1048)
    at org.drools.core.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1040)
    at org.drools.core.impl.StatefulKnowledgeSessionImpl.internalFireAllRules(StatefulKnowledgeSessionImpl.java:1330)
    at org.drools.core.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:1321)
    at org.drools.core.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:1305)
    at org.droolsassert.LogicalEventsTest.testUpdateLogicalEvent(LogicalEventsTest.java:58)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
    at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
    at org.droolsassert.DroolsAssert.evaluate(DroolsAssert.java:789)
    at org.droolsassert.DroolsAssert$1.evaluate(DroolsAssert.java:781)
    at org.junit.rules.RunRules.evaluate(RunRules.java:20)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:89)
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:41)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:542)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:770)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:464)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:210)
Caused by: [Error: drools.update($event, new org.drools.core.util.bitmask.LongBitMask(2L), org.droolsassert.LogicalEventsTest.Event.class): Currently we cannot modify something that has mixed stated and justified equal objects. Rule update logical event attempted an illegal operation]
[Near : {... $event.setMessage("Updated log ....}]
             ^
[Line: 1, Column: 1]
    at org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.compileGetChain(ReflectiveAccessorOptimizer.java:435)
    at org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.optimizeAccessor(ReflectiveAccessorOptimizer.java:163)
    at org.mvel2.ast.ASTNode.optimize(ASTNode.java:159)
    at org.mvel2.ast.ASTNode.getReducedValueAccelerated(ASTNode.java:115)
    at org.mvel2.MVELRuntime.execute(MVELRuntime.java:85)
    at org.mvel2.compiler.CompiledExpression.getDirectValue(CompiledExpression.java:123)
    at org.mvel2.compiler.CompiledExpression.getValue(CompiledExpression.java:119)
    at org.mvel2.compiler.CompiledExpression.getValue(CompiledExpression.java:113)
    at org.mvel2.MVEL.executeExpression(MVEL.java:929)
    at org.drools.core.base.mvel.MVELConsequence.evaluate(MVELConsequence.java:110)
    at org.drools.core.phreak.RuleExecutor.innerFireActivation(RuleExecutor.java:432)
    ... 39 more
Caused by: java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.getMethod(ReflectiveAccessorOptimizer.java:1119)
    at org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.getMethod(ReflectiveAccessorOptimizer.java:1002)
    at org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.compileGetChain(ReflectiveAccessorOptimizer.java:396)
    ... 49 more
Caused by: java.lang.IllegalStateException: Currently we cannot modify something that has mixed stated and justified equal objects. Rule update logical event attempted an illegal operation
    at org.drools.core.common.NamedEntryPoint.update(NamedEntryPoint.java:383)
    at org.drools.core.base.DefaultKnowledgeHelper.update(DefaultKnowledgeHelper.java:410)
    at org.drools.core.base.DefaultKnowledgeHelper.update(DefaultKnowledgeHelper.java:425)
    ... 56 more