java.util.ConcurrentModificationException: null
	at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1134)
	at org.drools.model.impl.NamesGenerator.generateName(NamesGenerator.java:32)
	at org.drools.modelcompiler.builder.generator.DRLIdGenerator.generateAccumulatorBindingId(DRLIdGenerator.java:79)
	at org.drools.modelcompiler.builder.generator.DRLIdGenerator.lambda$getOrCreateAccumulateBindingId$3(DRLIdGenerator.java:59)
	at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1133)
	at org.drools.modelcompiler.builder.generator.DRLIdGenerator.getOrCreateAccumulateBindingId(DRLIdGenerator.java:59)
	at org.drools.modelcompiler.builder.generator.RuleContext.getOrCreateAccumulatorBindingId(RuleContext.java:388)
	at org.drools.modelcompiler.builder.generator.visitor.accumulate.AccumulateVisitor.visit(AccumulateVisitor.java:178)
	at org.drools.modelcompiler.builder.generator.visitor.accumulate.AccumulateVisitor.classicAccumulate(AccumulateVisitor.java:145)
	at org.drools.modelcompiler.builder.generator.visitor.accumulate.AccumulateVisitor.visit(AccumulateVisitor.java:128)
	at org.drools.modelcompiler.builder.generator.visitor.ModelGeneratorVisitor.visit(ModelGeneratorVisitor.java:141)
	at org.drools.compiler.lang.descr.PatternDescr.accept(PatternDescr.java:288)
	at org.drools.modelcompiler.builder.generator.visitor.AndVisitor.visit(AndVisitor.java:50)
	at org.drools.modelcompiler.builder.generator.visitor.ModelGeneratorVisitor.visit(ModelGeneratorVisitor.java:86)
	at org.drools.modelcompiler.builder.generator.ModelGenerator.processRule(ModelGenerator.java:187)
	at org.drools.modelcompiler.builder.generator.ModelGenerator.generateModel(ModelGenerator.java:160)
	at org.drools.modelcompiler.builder.ModelBuilderImpl.compileKnowledgePackages(ModelBuilderImpl.java:284)
	at org.drools.modelcompiler.builder.ModelBuilderImpl.buildRules(ModelBuilderImpl.java:220)
	at org.drools.modelcompiler.builder.ModelBuilderImpl.postBuild(ModelBuilderImpl.java:130)
	at org.drools.compiler.builder.impl.CompositeKnowledgeBuilderImpl.build(CompositeKnowledgeBuilderImpl.java:111)
	at org.drools.compiler.builder.impl.CompositeKnowledgeBuilderImpl.build(CompositeKnowledgeBuilderImpl.java:97)
	at org.drools.compiler.kie.builder.impl.AbstractKieProject.buildKnowledgePackages(AbstractKieProject.java:268)
	at org.drools.compiler.kie.builder.impl.AbstractKieProject.buildKnowledgePackages(AbstractKieProject.java:216)
	at org.drools.compiler.kie.builder.impl.AbstractKieProject.verify(AbstractKieProject.java:80)
	at org.drools.compiler.kie.builder.impl.KieBuilderImpl.buildKieProject(KieBuilderImpl.java:279)
	at org.drools.compiler.kie.builder.impl.KieBuilderImpl.buildAll(KieBuilderImpl.java:247)
	at org.drools.compiler.kie.builder.impl.KieBuilderImpl.buildAll(KieBuilderImpl.java:204)