Two Slaves in the same tree are not working

Steps to reproduce

1. Create a new slave copy
2. Duplicate the slave inside the slave tree
3. Push of new content fails

Expected results

Either duplication of slave pages should be deactivated or better it just should work if there is no real blocker for it.

Actual results

Push of new content fails after 2 duplicates of a page exist in the slave tree

Workaround

Add deactivation rule to slave pages duplicate action.

Development notes