39The objective of that prohibition is therefore to prevent a group of undertakings from having the State bear the cost of a rescue operation for one of the undertakings belonging to the group, when that undertaking is in difficulty and the group itself has created those difficulties or has the means to deal with them on its own (see, to that effect, judgment of 13 May 2015, Niki Luftfahrt v Commission, T‑511/09, EU:T:2015:284, paragraph 159).