What happens if the Soviets don't leave Bornholm?

At the end of World War II, the Bornholm garrison of the German Army resisted overtures to surrender to the Soviet Union. The USSR responding by heavily bombing Nexø and Rønne, and eventually the garrison surrendered. It took a year for the Soviet Union to leave after making an agreement with the Danes about who can be based in Bornholm. What would happen if the Soviets didn't make serious attempts to withdraw from Bornholm and occupied it?
 
At the end of World War II, the Bornholm garrison of the German Army resisted overtures to surrender to the Soviet Union. The USSR responding by heavily bombing Nexø and Rønne, and eventually the garrison surrendered. It took a year for the Soviet Union to leave after making an agreement with the Danes about who can be based in Bornholm. What would happen if the Soviets didn't make serious attempts to withdraw from Bornholm and occupied it?

It seems like the sort of thing that would be exchanged for something else.

Assuming that there is no Bornholm people's Republic or East German state of Bornholm, maybe it'd be swapped Danish neutrality.

At this same time the Soviets were refusing to withdraw from Iran and were picking a fight with the Turks, so it isn't the wildest of ideas that they'd refuse to withdraw from Bornholm.
 
The question is why would Stalin do this? Just to be a dick to little Denmark? Do the strategic benefits of keeping the island outweigh the negative diplomatic effects of the continued occupation of Bornholm? I don't personally think so. Both the Danish and the Swedish governments would be quite unhappy with the USSR setting up shop on Bornholm in the long term (for obvious reasons), and thus this move by the Soviets would cause more anti-Soviet feelings in both Denmark and Sweden than IOTL. Depending on the butterflies, this TL could well see Sweden go *NATO along with Denmark.
 
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