diff --git a/src/backend/concrete_history.cc b/src/backend/concrete_history.cc
index dcf8c13..11eb02a 100644
--- a/src/backend/concrete_history.cc
+++ b/src/backend/concrete_history.cc
@@ -344,8 +344,6 @@ ConcreteHistory::edit_resource(Resource& resource,
                               size_t places,
                               size_t availability)
 {
-  reset(false);
-
   // And preemptable and availability?? FIXME!
 
   DynamicResource* res = dynamic_cast<DynamicResource*>(&resource);
@@ -353,8 +351,7 @@ ConcreteHistory::edit_resource(Resource& resource,
   core.set_name(name);
   core.set_places(places);
 
-  notify_change();
-
+  reset(true);
 }
 
 
@@ -382,15 +379,13 @@ ConcreteHistory::edit_process(Process& process,
                              time_t arrival_time,
                              prio_t base_priority)
 {
-  reset(false);
-
   DynamicProcess* proc = dynamic_cast<DynamicProcess*>(&process);
   StaticProcess& core = proc->get_core();
   core.set_name(name);
   core.set_arrival_time(arrival_time);
   core.set_priority(base_priority);
 
-  notify_change();
+  reset(true);
 }
 
 
@@ -421,8 +416,6 @@ ConcreteHistory::edit_thread(Thread& thread,
                             time_t arrival_time,
                             prio_t base_priority)
 {
-  reset(false);
-
   DynamicThread* thre = dynamic_cast<DynamicThread*>(&thread);
   StaticThread& core = thre->get_core();
   core.set_name(name);
@@ -430,7 +423,7 @@ ConcreteHistory::edit_thread(Thread& thread,
   core.set_arrival_time(arrival_time);
   core.set_priority(base_priority);
 
-  notify_change();
+  reset(true);
 }
 
 DynamicRequest&
@@ -455,13 +448,11 @@ void
 ConcreteHistory::edit_request(Request& request,
                              time_t instant)
 {
-  reset(false);
-
   DynamicRequest* req = dynamic_cast<DynamicRequest*>(&request);
   StaticRequest& core = req->get_core();
   core.set_instant(instant);
 
-  notify_change();
+  reset(true);
 }
 
 
@@ -488,14 +479,12 @@ ConcreteHistory::edit_subrequest(SubRequest& subrequest,
                                 resource_key_t resource_key,
                                 time_t  duration)
 {
-  reset(false);
-
   DynamicSubRequest* sreq = dynamic_cast<DynamicSubRequest*>(&subrequest);
   StaticSubRequest& core = sreq->get_core();
   core.set_resource_key(resource_key);
   core.set_length(duration);
 
-  notify_change();
+  reset(true);
 }
 
 void