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https://issues.apache.org/jira/browse/MNG-8301?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Maarten Mulders resolved MNG-8301.
----------------------------------
    Resolution: Not A Problem

Following MNG-8190, the observed behaviour is expected: a POM that wants to 
leverage features from Maven 4 should explicitly adhere to the 4.1.0 XSD and 
modelVersion.

> [REGRESSION] Can't build a project without modelVersion=4.1.0 but with 4.1.0 
> (beta-4) XSD
> -----------------------------------------------------------------------------------------
>
>                 Key: MNG-8301
>                 URL: https://issues.apache.org/jira/browse/MNG-8301
>             Project: Maven
>          Issue Type: Bug
>          Components: POM
>    Affects Versions: 4.0.0-beta-5
>         Environment: Apache Maven 4.0.0-beta-5-SNAPSHOT 
> (fee69f2f89c6f32dbef0ec55a7f6e8c071d4b6a9)
> Java version: 23, vendor: Eclipse Adoptium, runtime: 
> /Library/Java/JavaVirtualMachines/temurin-23.jdk/Contents/Home
> OS name: "mac os x", version: "14.6.1", arch: "aarch64", family: "mac"
>            Reporter: Didier Loiseau
>            Priority: Major
>
> A project whose pom.xml refers to the [4.1.0-beta-4 
> XSD|https://maven.apache.org/xsd/maven-4.1.0-beta-4.xsd] and that lacks a 
> {{modelVersion}} element used to be buildable with Maven 4.0.0-beta-4. Maven 
> would infer from the XSD that it should use _modelVersion_ 4.1.0.
> With the current snapshots of 4.0.0-beta-5, it can no longer be built:
> {quote}{{[ERROR]   The project 
> org.apache.maven.its.mng8301:module-b:1-SNAPSHOT 
> (/Users/maarten/Code/open-source/maven/m4-no-modelversion-repro/module-b/pom.xml)
>  has 1 error}}
> {{[ERROR]     'dependencies.dependency.version' for 
> org.apache.maven.repro:module-a:jar is missing. @ 
> org.apache.maven.its.mng8301:module-b:[unknown-version], 
> file:///Users/maarten/Code/open-source/maven/m4-no-modelversion-repro/module-b/pom.xml,
>  line 17, column 9}}
> {quote}



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