Adding Group node into a diagram makes the validation to fail

[jomarko]

Adding a group [1] node to any diagram using a tooling as of 14th of February 2025 makes the DMN Model validation to fail with a message [2]

Steps to reproduce

1. open some of kogito-example projects that contians a DMN diagram
2. run mvn clean install in such kogito-example project
3. it will pass 🟢
4. now open a DMN model of the selected project
5. add a GROUP node into that diagram [1] and save the DMN model
6. run mvn clean install
7. It will fail 🔴 as [2]

[1]

[2]

[ERROR] Errors: 
[ERROR]   TrafficViolationTest.testUtils » Runtime java.lang.RuntimeException: io.quarkus.builder.BuildException: Build failure: Build failed due to errors
        [error]: Build step org.kie.kogito.quarkus.common.deployment.KogitoAssetsProcessor#generateSources threw an exception: java.lang.RuntimeException: DMN Validation schema and model validation contained errors
You may configure kogito.decisions.validation=IGNORE to ignore validation errors
DMN Validation errors:
Utils: DMN: Unable to resolve dmnElementRef '_63A1F27D-C488-42AA-B586-8EBC54B7E868' on '[unnamed DMNShape]' (The referenced element could not be resolved) 
        at org.kie.kogito.codegen.decision.DecisionValidation.processMessagesHandleErrors(DecisionValidation.java:195)
        at org.kie.kogito.codegen.decision.DecisionValidation.dmnValidateResources(DecisionValidation.java:90)
        at org.kie.kogito.codegen.decision.DecisionCodegen.loadModelsAndValidate(DecisionCodegen.java:143)
        at org.kie.kogito.codegen.decision.DecisionCodegen.internalGenerate(DecisionCodegen.java:160)
        at org.kie.kogito.codegen.core.AbstractGenerator.generate(AbstractGenerator.java:72)
        at org.kie.kogito.codegen.core.ApplicationGenerator.lambda$generateComponents$1(ApplicationGenerator.java:101)
        at java.base/java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:273)
        at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1625)
        at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509)
        at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499)
        at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:921)
        at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
        at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:682)
        at org.kie.kogito.codegen.core.ApplicationGenerator.generateComponents(ApplicationGenerator.java:104)
        at org.kie.kogito.codegen.core.ApplicationGenerator.generate(ApplicationGenerator.java:78)
        at org.kie.kogito.quarkus.common.deployment.KogitoAssetsProcessor.generateFiles(KogitoAssetsProcessor.java:291)
        at org.kie.kogito.quarkus.common.deployment.KogitoAssetsProcessor.generateSources(KogitoAssetsProcessor.java:146)
        at java.base/java.lang.invoke.MethodHandle.invokeWithArguments(MethodHandle.java:732)
        at io.quarkus.deployment.ExtensionLoader$3.execute(ExtensionLoader.java:856)
        at io.quarkus.builder.BuildContext.run(BuildContext.java:256)
        at org.jboss.threads.ContextHandler$1.runWith(ContextHandler.java:18)
        at org.jboss.threads.EnhancedQueueExecutor$Task.doRunWith(EnhancedQueueExecutor.java:2516)
        at org.jboss.threads.EnhancedQueueExecutor$Task.run(EnhancedQueueExecutor.java:2495)
        at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1521)
        at java.base/java.lang.Thread.run(Thread.java:840)
        at org.jboss.threads.JBossThread.run(JBossThread.java:483)