Unable to find a suitable main class, please add a ‘mainClass’ property, Spring boot

In my case I had in main pom:

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.0.3.RELEASE</version>
</parent>

which includes plugin spring-boot-maven-plugin.

I had to add to main pom to skip it:

<plugin>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-maven-plugin</artifactId>
    <configuration>
        <skip>true</skip>
    </configuration>
</plugin>

and then in module with ma Application class:

<plugin>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-maven-plugin</artifactId>
    <configuration>
        <skip>false</skip>
    </configuration>
</plugin>