Multiple assemblies use the name "maven". Please assign each assembly a unique name. - using only single assembly

[tbfky]

[DEBUG] Configuring mojo 'io.fabric8:docker-maven-plugin:0.40.0-SNAPSHOT:build' with basic configurator -->
[DEBUG]   (f) buildArchiveOnly = false
[DEBUG]   (f) execution = io.fabric8:docker-maven-plugin:0.40.0-SNAPSHOT:build {execution: default-cli}
[DEBUG]   (s) name = test
[DEBUG]   (f) from = java:8
[DEBUG]   (f) descriptor = docker-assembly.xml
[DEBUG]   (f) assembly = io.fabric8.maven.docker.config.AssemblyConfiguration@7fef0b40
[DEBUG]   (f) build = io.fabric8.maven.docker.config.BuildImageConfiguration@5f395ce1
[DEBUG]   (f) images = [ImageConfiguration {name='test', alias='null'}]
[DEBUG]   (f) jib = false
[DEBUG]   (f) jibImageFormat = docker
[DEBUG]   (f) keepContainer = false
[DEBUG]   (f) logStdout = false
[DEBUG]   (f) maxConnections = 100
[DEBUG]   (f) outputDirectory = target/docker
[DEBUG]   (f) packaging = pom
[DEBUG]   (f) project = MavenProject: test:test:1.0.0-SNAPSHOT @ pom-bug.xml
[DEBUG]   (f) reactorProjects = [MavenProject: test:test:1.0.0-SNAPSHOT @ pom-bug.xml]
[DEBUG]   (f) removeVolumes = false
[DEBUG]   (f) session = org.apache.maven.execution.MavenSession@b30a50d
[DEBUG]   (f) settings = org.apache.maven.execution.SettingsAdapter@764a3e5d
[DEBUG]   (f) skip = false
[DEBUG]   (f) skipBuild = false
[DEBUG]   (f) skipExtendedAuth = false
[DEBUG]   (f) skipMachine = false
[DEBUG]   (f) skipPom = false
[DEBUG]   (f) skipTag = false
[DEBUG]   (f) sourceDirectory = src/main/docker
[DEBUG]   (f) useColor = true
[DEBUG] -- end configuration --
[ERROR] DOCKER> Multiple assemblies use the name "maven". Please assign each assembly a unique name.
pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>test</groupId>
    <artifactId>test</artifactId>
    <version>1.0.0-SNAPSHOT</version>
    <packaging>pom</packaging>

    <build>
        <plugins>
            <plugin>
                <groupId>io.fabric8</groupId>
                <artifactId>docker-maven-plugin</artifactId>
                <version>0.40.0-SNAPSHOT</version>
                <extensions>true</extensions>

                <configuration>
                    <images>
                        <image>
                            <name>test</name>
                            <build>
                                <from>java:8</from>
                                <assembly>
                                    <descriptor>docker-assembly.xml</descriptor>
                                </assembly>
                            </build>
                        </image>
                    </images>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

[tbfky]

Same issue with 0.39.1.