Hi voltairovicz,

https://www.openstreetmap.org/node/12362594588
I noticed you took the circumference value from here:
https://crfop.gdos.gov.pl/CRFOP/widok/viewpomnikprzyrody.jsf?fop=PL.ZIPOP.1393.PP.1425033.2489

Just a heads-up: the site uses centimetres as the default unit, while OSM expects metres for circumference.
I've corrected it—thanks, and happy mapping!