way/1484011511/history has building = 20

What this tag means? Numeric value is unexpected here and it is unclear what it means

吉林大学前卫北区

"不存在"
The place has gone or never existed. A user of Organic Maps application has reported that the POI was visible on the map (see snapshot date below), but was not found on the ground.
OSM snapshot date: 2023-08-14T02:00:17Z
POI name: 饺子馆
POI types: cuisine-chinese amenity-restaurant
#organicmaps android

"无此地点"
The place has gone or never existed. A user of Organic Maps application has reported that the POI was visible on the map (see snapshot date below), but was not found on the ground.
OSM snapshot date: 2023-08-14T02:00:17Z
POI name: 中国工商银行
POI types: amenity-atm amenity-bank
#organicmaps android