[core/meta] prevent potential double-deletion of getter/setter methods
[core/meta] prevent potential double-deletion of getter/setter methods

When assign operator used, setter/getter deleted but not reset
root-mirror/root,olifre/root,root-mirror/root,olifre/root,olifre/root,root-mirror/root,root-mirror/root,root-mirror/root,olifre/root,root-mirror/root,root-mirror/root,olifre/root,root-mirror/root,root-mirror/root,olifre/root,olifre/root,olifre/root,root-mirror/root,olifre/root,olifre/root,root-mirror/root,olifre/root