"Does not exist, at least not here"
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: 2026-02-16T20:35:12Z
POI name: Poço do Mandassaia
POI types: man_made-water_well
 #organicmaps android 2026.02.18-5-FDroid