fix: don't allow overlapping plot areas

Core/src/main/java/com/plotsquared/core/PlotSquared.java

@@ -795,9 +795,8 @@ public class PlotSquared {
         if (world.equals("CheckingPlotSquaredGenerator")) {
             return;
         }
-        if (!this.getPlotAreaManager().addWorld(world)) {
+        // Don't check the return result -> breaks runtime loading of single plot areas on creation
-            return;
+        this.getPlotAreaManager().addWorld(world);
-        }
         Set<String> worlds;
         if (this.worldConfiguration.contains("worlds")) {
             worlds = this.worldConfiguration.getConfigurationSection("worlds").getKeys(false);

Core/src/main/java/com/plotsquared/core/command/Area.java

@@ -184,6 +184,7 @@ public class Area extends SubCommand {
                         CuboidRegion.makeCuboid(playerSelectedRegion)
                 ).length != 0) {
                     player.sendMessage(TranslatableCaption.of("single.single_area_overlapping"));
+                    return false;
                 }
                 // Alter the region
                 final BlockVector3 playerSelectionMin = playerSelectedRegion.getMinimumPoint();