[Mageia-dev] how to upgrade a package with %_preun_service ?

[eatdirt]

Hi there,
package A is on mga2 and run at uninstall
%_preun_service myserv

package B (different name) obsoletes package A and at install run
%_post_service myserv

same name for "myserv".

When I run this, the old package %preun section remove the new service 
installed by package B. Any idea how to fix this?

Thanks,
Chris.