fixing enemy territory claim bug

game/territory-autobattler/scenes/game/hex_grid_screen.gd

@@ -1082,7 +1082,7 @@ func _on_move_units_request_completed(result: int, response_code: int, _headers:
 
 	_clear_selected_archers()
 	coordinate_label.text = "Archer squad moved."
-	_refresh_player_state()
+	_load_visible_locations()
 
 
 func _claim_selected_tile() -> void:

microservices/LocationsApi/Services/UnitTrainingService.cs

@@ -278,8 +278,14 @@ public class UnitTrainingService
             return;
         }
 
+        var emptyBuildingFilter = Builders<Location>.Filter.And(
+            Builders<Location>.Filter.Eq(x => x.Id, target.Id),
+            Builders<Location>.Filter.Or(
+                Builders<Location>.Filter.Eq(x => x.BuildingType, null),
+                Builders<Location>.Filter.Eq(x => x.BuildingType, "")));
+
         await _locations.UpdateOneAsync(
-            x => x.Id == target.Id && (x.BuildingType == null || x.BuildingType == ""),
+            emptyBuildingFilter,
             Builders<Location>.Update
                 .Set(x => x.OwnerUsername, username)
                 .Set(x => x.Kind, "Claimed")