eo-yaml: YamlIndentationException: Indentation of line 4 is greater than the one of line 3

Some of the YAML files, which this project is not able to parse.

apiVersion: v1
appVersion: 5.7.30
description: Fast, reliable, scalable, and easy to use open-source relational database
  system.
home: https://www.mysql.com/
icon: https://www.mysql.com/common/logos/logo-mysql-170x115.png
keywords:
- mysql
- database
- sql
maintainers:
- email: o.with@sportradar.com
  name: olemarkus
- email: viglesias@google.com
  name: viglesiasce
name: mysql
sources:
- https://github.com/kubernetes/charts
- https://github.com/docker-library/mysql
version: 1.6.4

apiVersion: v1
name: tomcat
description: Deploy a basic tomcat application server with sidecar as web archive container
icon: http://tomcat.apache.org/res/images/tomcat.png
version: 0.4.1
appVersion: "7.0"
home: https://github.com/yahavb
maintainers:
  - name: yahavb
    email: ybiran@ananware.systems

Stack trace:

com.amihaiemil.eoyaml.exceptions.YamlIndentationException: Indentation of line 4 is greater than the one of line 3. It should be less or equal.

	at com.amihaiemil.eoyaml.WellIndented.iterator(WellIndented.java:120)
	at com.amihaiemil.eoyaml.SameIndentationLevel.iterator(SameIndentationLevel.java:74)
	at com.amihaiemil.eoyaml.ReadYamlMapping.valueOfStringKey(ReadYamlMapping.java:182)
	at com.amihaiemil.eoyaml.ReadYamlMapping.value(ReadYamlMapping.java:136)
	at com.amihaiemil.eoyaml.YamlMapping.string(YamlMapping.java:147)
	at com.amihaiemil.eoyaml.YamlMapping.string(YamlMapping.java:135)
	at com.artipie.helm.TgzArchive.name(TgzArchive.java:82)
	at com.artipie.helm.TarArchiveTest.nameIdentifiedCorrectly(TarArchiveTest.java:47)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

Note: some of the YAML validators claims that those 2 files are actually valid ones