Funny unresolvables in network:ldap and projects branched from there: nothing provides libldap-data = 2.4.46-150600.23.21 needed by libldap-2_4-2, (got version 2.6.8-lp156.3.3)

Hi all, am currently preparing packages for the LLDAP ldap server and utilities. I prepared them in a branch project derived from network:ldap. For some reason, almost all builds for 15.5 and 15.6 are unresolvable.

nothing provides libldap-data = 2.4.46-150600.23.21 needed by libldap-2_4-2, (got version 2.6.8-lp156.3.3)

Funny thing is, nothing in the package explicitely pulls in libldap-2_4-2. The only package that builds is the lldap-cli, which is just a bash script, built with "noarch".

https://build.opensuse.org/project/monitor/home:ojkastl_buildservice:Branch_...

I noticed the same errors in network:ldap for some packages.

https://build.opensuse.org/project/monitor/network:ldap?defaults=0&unresolvable=1&arch_aarch64=1&arch_armv7l=1&arch_i586=1&arch_ppc64le=1&arch_x86_64=1&repo_15_5=1&repo_15_6=1&repo_openSUSE_Factory_ARM=1&repo_openSUSE_Factory_PowerPC=1&repo_openSUSE_Tumbleweed=1

I tried to find out if something in some prjconf forces the installation of libldap-2_4-2, but did not find anything. Could it be that this package is automatically installed on every (non-noarch) build? But why are there some packages in network:ldap that build fine? Can anyone explain why this happens? I would really like to understand what goes wrong there. And how I could find out myself the next time I stumble upon such an error... And, for a bonus, how the hell can we get rid of this error properly? I currently tried this:

%if "%_repository" == "15.5" Ignore: libldap-2_4-2 %endif

Kind Regards, Johannes