I did some research at  Naturvårdsverkets website: That way shows the extent of the NR with NVR-ID 2046454 from "Beslutsdatum (bildande) 2018-02-15". The NVRID you are refering to is newer with  "Beslutsdatum 2025-12-17" an a lot larger. What astonishes me is that both NRs are called "Gällande" at Naturvårdsverkets website and both shown overlapping in the maps. 
Since I'm not from Sweden I dare not simply map both overlapping NRs (with the same name, the new one including the old one completely) if I don't understand why this - which I can find theoretical  reasons for, but is unusual -  happend. Could yo please verify this with the authorities?