Danube Delta Condominium in Central Powers victory

In the Treaty of Bucharest, the CP created a joint occupied zone around the Danubes delta and northern Dobruja. In OTL it was awarded to Bulgaria to keep them in the war, however this would not have been necessary in a CP victory. Assuming the way the war is won doesn’t butterfly a similar treaty, what would happen to the territory? Would it be returned to Romania or given to Bulgaria? Or might it become internationalized like the Danube river?
 
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