Fix FlagStorage issues

BauSystem_Main/src/de/steamwar/bausystem/region/FlagStorage.java

@@ -21,6 +21,7 @@ package de.steamwar.bausystem.region;
 
 import de.steamwar.bausystem.region.flags.Flag;
 import yapion.annotations.object.YAPIONData;
+import yapion.annotations.object.YAPIONPreDeserialization;
 
 import java.util.EnumMap;
 import java.util.Map;
@@ -35,6 +36,11 @@ public class FlagStorage {
 		readKeys();
 	}
 
+	@YAPIONPreDeserialization
+	private void preDeserializer() {
+	    readKeys();
+	}
+
 	public boolean set(final Flag flagType, final Flag.Value<?> value) {
 		return flags.put(flagType, value) != value;
 	}