Looking for advice on borretslagloven § 5-21 because I can't sell my apartment and feel stuck.

4 years ago I bought a brand new apartment in a borretslag with high fellesgjeld, I have been trying to sell it for almost a year but no luck. Several apartments in the same building have also been on sale for some time as well.

Recently found out about borretslagloven §5-21 from a colleague at work. He told me If I feel stuck and desperate to leave the apartment and its economic burden, I could just terminate my right to live there.

While the law does exist, I'm not sure if actually let's me walk away after the 6 months notice. There is very little info regarding this. So I'm wondering if anyone is familiar with this law and could explain it?

I bought the apartment without a bank loan.