diff --git a/li.strolch.model/src/main/java/li/strolch/model/Order.java b/li.strolch.model/src/main/java/li/strolch/model/Order.java
index 726b047bc..f7197f7f6 100644
--- a/li.strolch.model/src/main/java/li/strolch/model/Order.java
+++ b/li.strolch.model/src/main/java/li/strolch/model/Order.java
@@ -88,6 +88,12 @@ public class Order extends AbstractStrolchRootElement implements StrolchRootElem
 		setDate(date);
 	}
 
+	@Override
+	public void setId(String id) {
+		this.locator = null;
+		super.setId(id);
+	}
+
 	@Override
 	public String getObjectType() {
 		return Tags.ORDER;
diff --git a/li.strolch.model/src/main/java/li/strolch/model/Resource.java b/li.strolch.model/src/main/java/li/strolch/model/Resource.java
index 6dcd12ce6..a8f993160 100644
--- a/li.strolch.model/src/main/java/li/strolch/model/Resource.java
+++ b/li.strolch.model/src/main/java/li/strolch/model/Resource.java
@@ -59,6 +59,12 @@ public class Resource extends AbstractStrolchRootElement implements StrolchRootE
 		super(id, name, type);
 	}
 
+	@Override
+	public void setId(String id) {
+		this.locator = null;
+		super.setId(id);
+	}
+
 	@Override
 	public String getObjectType() {
 		return Tags.RESOURCE;
diff --git a/li.strolch.model/src/main/java/li/strolch/model/activity/Activity.java b/li.strolch.model/src/main/java/li/strolch/model/activity/Activity.java
index d191139c9..b509ca6d3 100644
--- a/li.strolch.model/src/main/java/li/strolch/model/activity/Activity.java
+++ b/li.strolch.model/src/main/java/li/strolch/model/activity/Activity.java
@@ -70,6 +70,12 @@ public class Activity extends AbstractStrolchRootElement
 		this.timeOrdering = timeOrdering;
 	}
 
+	@Override
+	public void setId(String id) {
+		this.locator = null;
+		super.setId(id);
+	}
+
 	@Override
 	public String getObjectType() {
 		return Tags.ACTIVITY;