--- a/artifacts/src/main/java/org/dive4elements/river/artifacts/bundu/bezugswst/BezugswstFixationFacet.java	Mon Sep 24 18:01:10 2018 +0200
+++ b/artifacts/src/main/java/org/dive4elements/river/artifacts/bundu/bezugswst/BezugswstFixationFacet.java	Tue Sep 25 16:43:51 2018 +0200
@@ -11,6 +11,7 @@
 
 import java.util.List;
 
+import org.dive4elements.artifactdatabase.state.Facet;
 import org.dive4elements.river.artifacts.common.AbstractCalculationExportableResult;
 import org.dive4elements.river.artifacts.model.CalculationResult;
 import org.dive4elements.river.artifacts.model.WQKms;
@@ -19,6 +20,8 @@
 
 public class BezugswstFixationFacet extends FixWaterlevelFacet {
 
+    private static final long serialVersionUID = 1L;
+
     public BezugswstFixationFacet() {
     }
 
@@ -39,4 +42,14 @@
         return null;
     }
 
+    /** Copy deeply. */
+    @Override
+    public Facet deepCopy() {
+        final BezugswstFixationFacet copy = new BezugswstFixationFacet();
+        copy.set(this);
+        copy.type = this.type;
+        copy.hash = this.hash;
+        copy.stateId = this.stateId;
+        return copy;
+    }
 }