diff --git a/03/src/de/dis2013/data/mapping/Contract.hbm.xml b/03/src/de/dis2013/data/mapping/Contract.hbm.xml
index 6bd1c09..6a4dceb 100644
--- a/03/src/de/dis2013/data/mapping/Contract.hbm.xml
+++ b/03/src/de/dis2013/data/mapping/Contract.hbm.xml
@@ -5,7 +5,7 @@
 <hibernate-mapping>
 	<class name="de.dis2013.data.Vertrag" table="contract" schema="VSISP12">
 		<id name="vertragsnummer" column="contractnumber">
-			<generator class="increment" />
+			<generator class="identity" />
 		</id>
 		<property name="datum" type="date" column="date" />
 		<property name="ort" type="string" column="place" />
diff --git a/03/src/de/dis2013/data/mapping/Immobilie.hbm.xml b/03/src/de/dis2013/data/mapping/Immobilie.hbm.xml
index 48c3eed..a13c834 100644
--- a/03/src/de/dis2013/data/mapping/Immobilie.hbm.xml
+++ b/03/src/de/dis2013/data/mapping/Immobilie.hbm.xml
@@ -5,7 +5,7 @@
 <hibernate-mapping>
 	<class name="de.dis2013.data.Immobilie" table="estate" schema="VSISP12">
 		<id name="id" column="id">
-			<generator class="increment" />
+			<generator class="identity" />
 		</id>
 		<property name="ort" type="string" column="city" />
 		<property name="plz" type="integer" column="postalcode" />
diff --git a/03/src/de/dis2013/data/mapping/Makler.hbm.xml b/03/src/de/dis2013/data/mapping/Makler.hbm.xml
index d5f703a..9a8e3d6 100644
--- a/03/src/de/dis2013/data/mapping/Makler.hbm.xml
+++ b/03/src/de/dis2013/data/mapping/Makler.hbm.xml
@@ -5,7 +5,7 @@
 <hibernate-mapping>
 	<class name="de.dis2013.data.Makler" table="estateagent" schema="VSISP12">
 		<id name="id" column="id">
-			<generator class="increment" />
+			<generator class="identity" />
 		</id>
 		<property name="name" type="string" column="name" />
 		<property name="adresse" type="string" column="adress" />
diff --git a/03/src/de/dis2013/data/mapping/Person.hbm.xml b/03/src/de/dis2013/data/mapping/Person.hbm.xml
index e98fd41..e0cab4a 100644
--- a/03/src/de/dis2013/data/mapping/Person.hbm.xml
+++ b/03/src/de/dis2013/data/mapping/Person.hbm.xml
@@ -5,7 +5,7 @@
 <hibernate-mapping>
 	<class name="de.dis2013.data.Person" table="person" schema="VSISP12">
 		<id name="id" column="id">
-			<generator class="increment" />
+			<generator class="identity" />
 		</id>
 		<property name="vorname" type="string" column="firstname" />
 		<property name="nachname" type="string" column="name" />