set value deferred, removed mapperId for single collections

set value deferred, removed mapperId for single collections:

__Tasks:__

- [x] test coverage
- [ ] gather feedback for my changes


__Informations:__

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| Tests pass?   | no
| Fixed tickets | none
| Doc           | none