diff --git a/datastore_server/source/java/ch/systemsx/cisd/etlserver/registrator/api/v2/JythonTopLevelDataSetHandlerV2.java b/datastore_server/source/java/ch/systemsx/cisd/etlserver/registrator/api/v2/JythonTopLevelDataSetHandlerV2.java
index 6c6c2a8720d602600010a8986b6664c0d5cb3fab..f8a08eca1c95981d59029d6dbc9eebd0456ec94e 100644
--- a/datastore_server/source/java/ch/systemsx/cisd/etlserver/registrator/api/v2/JythonTopLevelDataSetHandlerV2.java
+++ b/datastore_server/source/java/ch/systemsx/cisd/etlserver/registrator/api/v2/JythonTopLevelDataSetHandlerV2.java
@@ -47,7 +47,6 @@ import ch.systemsx.cisd.etlserver.registrator.IDataSetOnErrorActionDecision.Erro
 import ch.systemsx.cisd.etlserver.registrator.MarkerFileUtility;
 import ch.systemsx.cisd.etlserver.registrator.api.v1.IDataSetRegistrationTransaction;
 import ch.systemsx.cisd.etlserver.registrator.api.v1.impl.AbstractTransactionState;
-import ch.systemsx.cisd.etlserver.registrator.api.v1.impl.DataSetRegistrationTransaction;
 import ch.systemsx.cisd.etlserver.registrator.api.v1.impl.RollbackStack;
 import ch.systemsx.cisd.etlserver.registrator.api.v1.impl.RollbackStack.IRollbackStackDelegate;
 import ch.systemsx.cisd.etlserver.registrator.recovery.AbstractRecoveryState;