We noticed the the Pom files for slf4j haven't been publish on repo1.maven.org. So we decided to deploy them to our local repo.

Doing this using mvn deploy causes an error on the child projects as they contain
<version>${parent.version}</version>
This breaks the deployment into some maven repos (e.g. Artifactory). You could argue this is an artifactory bug however removing this line from the POM results in no changes in behaviour as maven will automatically inherit the version number from the parent pom.

I have attached a patch fixing this.