--- a/artifacts/src/main/java/org/dive4elements/river/artifacts/model/sq/SQMeasurementFacet.java	Fri Oct 18 15:30:44 2013 +0200
+++ b/artifacts/src/main/java/org/dive4elements/river/artifacts/model/sq/SQMeasurementFacet.java	Fri Oct 18 15:44:01 2013 +0200
@@ -10,6 +10,8 @@
 
 import org.apache.log4j.Logger;
 
+import org.dive4elements.artifactdatabase.state.Facet;
+
 import org.dive4elements.artifacts.Artifact;
 import org.dive4elements.artifacts.CallContext;
 
@@ -71,9 +73,13 @@
 
 
     @Override
-    public SQMeasurementFacet deepCopy() {
+    public Facet deepCopy() {
         SQMeasurementFacet copy = new SQMeasurementFacet();
         copy.set(this);
+        copy.type    = type;
+        copy.hash    = hash;
+        copy.stateId = stateId;
+        copy.fractionIdx = fractionIdx;
 
         return copy;
     }