Dependency error running project

[vcupelloni]

Hi,
I'm trying to execute the three steps as described in README but when I execute

mvn spring-boot:run -DCLOUDKARAFKA_USERNAME=........

the result is an error for unresolved dependencies.

Console

[INFO] Scanning for projects...
Downloading from central: https://repo.maven.apache.org/maven2/org/springframework/boot/spring-boot-samples/$%7Brevision%7D/spring-boot-samples-$%7Brevision%7D.pom
[ERROR] [ERROR] Some problems were encountered while processing the POMs:
[FATAL] Non-resolvable parent POM for org.springframework.boot:spring-boot-sample-kafka:[unknown-version]: Could not find artifact org.springframework.boot:spring-boot-samples:pom:${revision} in central (https://repo.maven.apache.org/maven2) and 'parent.relativePath' points at wrong local POM @ line 5, column 10
@
[ERROR] The build could not read 1 project -> [Help 1]
[ERROR]
[ERROR] The project org.springframework.boot:spring-boot-sample-kafka:[unknown-version] (/home/vcupelloni/Lavoro/creactive/springboot-kafka-example/pom.xml) has 1 error
[ERROR] Non-resolvable parent POM for org.springframework.boot:spring-boot-sample-kafka:[unknown-version]: Could not find artifact org.springframework.boot:spring-boot-samples:pom:${revision} in central (https://repo.maven.apache.org/maven2) and 'parent.relativePath' points at wrong local POM @ line 5, column 10 -> [Help 2]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/ProjectBuildingException
[ERROR] [Help 2] http://cwiki.apache.org/confluence/display/MAVEN/UnresolvableModelException

[DariusX]

Shoudn't the parent be:

    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.1.6.RELEASE</version>