fix: do not overwrite bedrock with wall

- Fixes #4047

Core/src/main/java/com/plotsquared/core/plot/Plot.java

@@ -20,6 +20,7 @@ package com.plotsquared.core.plot;
 
 import com.google.common.collect.ImmutableSet;
 import com.google.common.collect.Lists;
+import com.google.common.collect.Sets;
 import com.google.inject.Inject;
 import com.plotsquared.core.PlotSquared;
 import com.plotsquared.core.command.Like;
@@ -2417,6 +2418,7 @@ public class Plot {
         if (!this.isMerged()) {
             Location pos1 = this.getBottomAbs().withY(getArea().getMinBuildHeight());
             Location pos2 = this.getTopAbs().withY(getArea().getMaxBuildHeight());
+            this.connectedCache = Sets.newHashSet(this);
             CuboidRegion rg = new CuboidRegion(pos1.getBlockVector3(), pos2.getBlockVector3());
             return Collections.singleton(rg);
         }

gradle/libs.versions.toml

@@ -1,6 +1,6 @@
 [versions]
 # Platform expectations
-guice = "7.0.0"
+guice = "5.1.0"
 spotbugs = "4.7.3"
 
 # Plugins