Why is Jira core dependeny so bad ?

[Albert Cameron]

Just adding this dependeny leads to my plugin not working anymore. 

<dependency>
    <groupId>com.atlassian.jira</groupId>
    <artifactId>jira-core</artifactId>
    <version>8.3.1</version>
</dependency>

I am not even using any classes of this dependency.

Why is that ?

Error in log:

(version=9.0)) Unresolved requirements: [[de.mycompany.area.project [279](R 279.0)] osgi.ee; (&(osgi.ee=JavaSE)(version=9.0))]

[Albert Cameron]

Looks like

<scope>provided</scope>

was missing.

Why is scope provided needed ?? 

Maybe the problem is that on Jira System some other jira-core version is installed. So it could mess with my jira-core version. 

Does that make sense ?