Key legal question
Whether the bankruptcy administration could revoke the Art. 260 SchKG assignments to D.________ and E.________ after those creditors transferred their bankruptcy claims to X.________ AG.
Extracted holding
The assignments became ineffective; X.________ AG could not succeed to the assigned litigation rights against itself, so the revocation decisions were only declaratory.
Extracted reasoning
A transfer of the bankruptcy claim carries the Art. 260 litigation right, but an assignment of that right to the debtor of the assigned claim is void. The same bar applies to succession into an assignment already issued to others.