hboutemy opened a new issue, #12774:
URL: https://github.com/apache/maven/issues/12774

   ### Affected version
   
   4.0.0-rc-6
   
   ### Bug description
   
   found while testing 
https://github.com/apache/maven-jar-plugin/pull/508#issuecomment-5352213156 but 
clearly purely Maven core issue
   
   on any simple Maven build with Maven 4.0.0-rc6, `mvn package compiler:help` 
makes maven-jar-plugin doing twice attach, and just before `compiler:help` we 
get a new second build header:
   
   ```
   ❯ mvn -V -DskipTests package compiler:help
   Apache Maven 4.0.0-rc-6 (6a8189b24518daa120539fa41ce12f2b48ec09a8)
   Maven home: /home/herve/.sdkman/candidates/maven/4.0.0-rc-6
   Java version: 21.0.1, vendor: Oracle Corporation, runtime: 
/home/herve/.sdkman/candidates/java/21.0.1-open
   Default locale: fr_FR, platform encoding: UTF-8, time zone: Europe/Paris
   OS name: "linux", version: "6.8.0-137-generic", arch: "amd64", family: "unix"
   [INFO] Scanning for projects...
   [INFO] Loaded 23569 auto-discovered prefixes for remote repository central 
(prefixes-central.txt)
   [INFO] 
   [INFO] ----------------------------------< 
org.apache.maven.shared:maven-dependency-analyzer 
>-----------------------------------
   [INFO] Building Apache Maven Dependency Analyzer 1.17.2-SNAPSHOT
   [INFO]   from pom.xml
   [INFO] ---------------------------------------------------------[ jar 
]----------------------------------------------------------
   ...
   [INFO] --- surefire:3.5.6:test (default-test) @ maven-dependency-analyzer ---
   [INFO] Tests are skipped.
   [INFO] 
   [INFO] --- jar:3.5.0:jar (default-jar) @ maven-dependency-analyzer ---
   [WARNING] artifact 
'org.apache.maven.shared:maven-dependency-analyzer:pom:consumer:1.17.2-SNAPSHOT'
 already attached, replacing previous instance
   [INFO] 
   [INFO] ----------------------------------< 
org.apache.maven.shared:maven-dependency-analyzer 
>-----------------------------------
   [INFO] Building Apache Maven Dependency Analyzer 1.17.2-SNAPSHOT
   [INFO]   from pom.xml
   [INFO] ---------------------------------------------------------[ jar 
]----------------------------------------------------------
   [INFO] 
   [INFO] --- compiler:3.15.0:help (default-cli) @ maven-dependency-analyzer ---
   ...
   ```
   


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