diff --git a/src/lib/ngsi10/SubscribeContextRequest.cpp b/src/lib/ngsi10/SubscribeContextRequest.cpp
index a0e2b19022..e36fa0f55b 100644
--- a/src/lib/ngsi10/SubscribeContextRequest.cpp
+++ b/src/lib/ngsi10/SubscribeContextRequest.cpp
@@ -73,20 +73,10 @@ std::string SubscribeContextRequest::check(const std::string& predetectedError,
 *
 * SubscribeContextRequest::release -
 *
-* Old versions of this method also include a 'restriction.release()' call. However, now each time
-* a SubscribeContextRequest is created, the method toNgsiv2Subscription() is used on it and the
-* 'ownership' of the Restriction is transferred to the corresponding NGSIv2 class. Thus, leaving
-* that 'restriction.release()' would cause double-free problems.
-*
-* What causes the problem is the following line in SubscribeContextRequest::toNgsiv2Subscription:
-*
-*  sub->restriction = restriction;
-*
-* After doing this, we have TWO vectors pointing to the same scopes.
-*
 */
 void SubscribeContextRequest::release(void)
 {
+  restriction.release();
   entityIdVector.release();
   attributeList.release();
   notifyConditionVector.release();
@@ -109,80 +99,3 @@ void SubscribeContextRequest::fill(EntityTypeInfo typeInfo)
     restriction.scopeVector.push_back(scopeP);
   }
 }
-
-
-/* ****************************************************************************
-*
-* SubscribeContextRequest::toNgsiv2Subscription -
-*/
-void SubscribeContextRequest::toNgsiv2Subscription(Subscription* sub)
-{
-  // Convert entityIdVector
-  for (unsigned int ix = 0; ix < entityIdVector.size(); ++ix)
-  {
-    EntityId* enP = entityIdVector[ix];
-    EntID en;
-
-    if (enP->isPatternIsTrue())
-    {
-      en.idPattern = enP->id;
-    }
-    else
-    {
-      en.id = enP->id;
-    }
-    en.type = enP->type;
-
-    sub->subject.entities.push_back(en);
-  }
-
-  // Convert attributeList
-  for (unsigned int ix = 0; ix < attributeList.size(); ++ix)
-  {
-    sub->notification.attributes.push_back(attributeList[ix]);
-  }
-
-  // Convert reference
-  sub->notification.httpInfo.url = reference.get();
-
-  // Convert duration
-  if (duration.isEmpty())
-  {
-    sub->expires = DEFAULT_DURATION_IN_SECONDS + getCurrentTime();
-  }
-  else
-  {
-    sub->expires = duration.parse() + getCurrentTime();
-  }
-
-  // Convert restriction
-  sub->restriction = restriction;
-
-  // Convert notifyConditionVector
-  for (unsigned int ix = 0; ix < notifyConditionVector.size(); ++ix)
-  {
-      NotifyCondition* ncP = notifyConditionVector[ix];
-      if (ncP->type == ON_CHANGE_CONDITION)    // this is just a sanity measure: all types should be ONCHANGE
-      {
-        for (unsigned int jx = 0; jx < ncP->condValueList.size(); ++jx)
-        {
-          sub->subject.condition.attributes.push_back(ncP->condValueList[jx]);
-        }
-      }
-  }
-
-  // Convert throttling
-  sub->throttling = throttling.parse();
-
-  // Note that we don't do anything with 'restrictions': it is not needed by the NGSIv2 logic
-
-  // Fill NGSIv2 fields not used in NGSIv1 with default values
-  // description and expression are not touched, so default empty string provided by constructor will be used
-  sub->status                         = STATUS_ACTIVE;
-  sub->descriptionProvided            = false;
-  sub->attrsFormat                    = NGSI_V2_NORMALIZED;
-  sub->notification.blacklist         = false;
-  sub->notification.httpInfo.custom   = false;
-
-  sub->notification.metadata.clear();
-}
diff --git a/src/lib/ngsi10/SubscribeContextRequest.h b/src/lib/ngsi10/SubscribeContextRequest.h
index edd7abe476..ed3abd4346 100644
--- a/src/lib/ngsi10/SubscribeContextRequest.h
+++ b/src/lib/ngsi10/SubscribeContextRequest.h
@@ -62,7 +62,6 @@ typedef struct SubscribeContextRequest
 
   std::string  check(const std::string& predetectedError, int counter);
   void         release(void);
-  void         toNgsiv2Subscription(ngsiv2::Subscription* sub);
 
   void         fill(EntityTypeInfo typeInfo);
 } SubscribeContextRequest;
diff --git a/src/lib/ngsi10/UpdateContextSubscriptionRequest.cpp b/src/lib/ngsi10/UpdateContextSubscriptionRequest.cpp
index c888956db3..721eaabdfe 100644
--- a/src/lib/ngsi10/UpdateContextSubscriptionRequest.cpp
+++ b/src/lib/ngsi10/UpdateContextSubscriptionRequest.cpp
@@ -87,42 +87,6 @@ std::string UpdateContextSubscriptionRequest::check(const std::string& predetect
 */
 void UpdateContextSubscriptionRequest::release(void)
 {
-  // Old versions of this method also include a 'restriction.release()' call. However, now each time
-  // a UpdateContextSubscriptionRequest is created, the method toNgsiv2Subscription() is used on it and the
-  // 'ownership' of the Restriction is transferred to the corresponding NGSIv2 class. Thus, leaving
-  // that 'restriction.release()' would cause double-free problems
-
+  restriction.release();
   notifyConditionVector.release();
-}
-
-
-
-/* ****************************************************************************
-*
-* UpdateContextSubscriptionRequest::toNgsiv2Subscription -
-*/
-void UpdateContextSubscriptionRequest::toNgsiv2Subscription(SubscriptionUpdate* subUp)
-{
-  // Parent method will do most of the work
-  SubscribeContextRequest::toNgsiv2Subscription(subUp);
-
-  // Fill remaining fields in SubscriptionUpdate
-  subUp->id         = subscriptionId.get();
-  subUp->fromNgsiv1 = true;
-
-  // Fields that can be modified in a NGSIv1 subscription
-  // (See https://fiware-orion.readthedocs.io/en/master/user/updating_regs_and_subs/index.html)
-  //
-  //  * notifyConditions (within subject in NGSIv2)
-  //  * throttling       (root field in NGSIv2)
-  //  * duration         (root field -as 'expires'- in NGSIv2)
-  //  * restriction      (already processed in the parent method)
-
-  subUp->subjectProvided      = (notifyConditionVector.size() > 0);
-  subUp->expiresProvided      = !duration.isEmpty();
-  subUp->statusProvided       = false;  // not supported in NGSIv1
-  subUp->notificationProvided = false;  // NGSIv1 doesn's allow changes in that part
-  subUp->attrsFormatProvided  = true;   // updating in NGSIv1 involves and implicit change to NGSIv1 legacy format
-  subUp->throttlingProvided   = !throttling.isEmpty();
-
-}
+}
\ No newline at end of file
diff --git a/src/lib/ngsi10/UpdateContextSubscriptionRequest.h b/src/lib/ngsi10/UpdateContextSubscriptionRequest.h
index e96d8e435d..a0d3ecf9d3 100644
--- a/src/lib/ngsi10/UpdateContextSubscriptionRequest.h
+++ b/src/lib/ngsi10/UpdateContextSubscriptionRequest.h
@@ -50,7 +50,6 @@ struct UpdateContextSubscriptionRequest : public SubscribeContextRequest
   UpdateContextSubscriptionRequest();  
   std::string check(const std::string& predetectedError, int counter);
   void        release(void);
-  void        toNgsiv2Subscription(ngsiv2::SubscriptionUpdate* subUp);
 };
 
 #endif  // SRC_LIB_NGSI10_UPDATECONTEXTSUBSCRIPTIONREQUEST_H_