diff --git a/include/sta/Parasitics.hh b/include/sta/Parasitics.hh
index b548eef4..e1c20039 100644
--- a/include/sta/Parasitics.hh
+++ b/include/sta/Parasitics.hh
@@ -60,6 +60,8 @@ public:
   virtual void deleteParasitics(const Pin *pin,
 				const ParasiticAnalysisPt *ap) = 0;
   virtual void deleteUnsavedParasitic(Parasitic *parasitic) = 0;
+  virtual void deleteReducedParasitics(const Net *net,
+                                       const ParasiticAnalysisPt *ap) = 0;
   virtual void deleteDrvrReducedParasitics(const Pin *drvr_pin) = 0;
 
   virtual bool isReducedParasiticNetwork(Parasitic *parasitic) const = 0;
diff --git a/parasitics/ConcreteParasitics.cc b/parasitics/ConcreteParasitics.cc
index 5da55bc7..334518a7 100644
--- a/parasitics/ConcreteParasitics.cc
+++ b/parasitics/ConcreteParasitics.cc
@@ -999,6 +999,19 @@ ConcreteParasitics::loadPinCapacitanceChanged(const Pin *pin)
   deleteReducedParasitics(pin);
 }
 
+void
+ConcreteParasitics::deleteReducedParasitics(const Net *net,
+                                            const ParasiticAnalysisPt *ap)
+{
+  if (!drvr_parasitic_map_.empty()) {
+    PinSet *drivers = network_->drivers(net);
+    if (drivers) {
+      for (auto drvr_pin : *drivers)
+        deleteDrvrReducedParasitics(drvr_pin, ap);
+    }
+  }
+}
+
 // Delete reduced models on pin's net.
 void
 ConcreteParasitics::deleteReducedParasitics(const Pin *pin)
@@ -1027,6 +1040,19 @@ ConcreteParasitics::deleteDrvrReducedParasitics(const Pin *drvr_pin)
   drvr_parasitic_map_[drvr_pin] = nullptr;
 }
 
+void
+ConcreteParasitics::deleteDrvrReducedParasitics(const Pin *drvr_pin,
+                                                const ParasiticAnalysisPt *ap)
+{
+  UniqueLock lock(lock_);
+  ConcreteParasitic **parasitics = drvr_parasitic_map_[drvr_pin];
+  if (parasitics) {
+    int ap_index = ap->index();
+    delete parasitics[ap_index];
+    parasitics[ap_index] = nullptr;
+  }
+}
+
 ////////////////////////////////////////////////////////////////
 
 bool
diff --git a/parasitics/ConcreteParasitics.hh b/parasitics/ConcreteParasitics.hh
index f777a1bb..ceca77e0 100644
--- a/parasitics/ConcreteParasitics.hh
+++ b/parasitics/ConcreteParasitics.hh
@@ -193,6 +193,8 @@ public:
 				      const Corner *corner,
 				      const MinMax *cnst_min_max,
 				      const ParasiticAnalysisPt *ap);
+  void deleteReducedParasitics(const Net *net,
+                               const ParasiticAnalysisPt *ap);
   virtual void deleteDrvrReducedParasitics(const Pin *drvr_pin);
 
 protected:
@@ -201,6 +203,8 @@ protected:
   Parasitic *ensureRspf(const Pin *drvr_pin);
   void makeAnalysisPtAfter();
   void deleteReducedParasitics(const Pin *pin);
+  void deleteDrvrReducedParasitics(const Pin *drvr_pin,
+                                   const ParasiticAnalysisPt *ap);
 
   // Driver pin to array of parasitics indexed by analysis pt index
   // and transition.
diff --git a/parasitics/SpefReader.cc b/parasitics/SpefReader.cc
index be7194c0..45b5185a 100644
--- a/parasitics/SpefReader.cc
+++ b/parasitics/SpefReader.cc
@@ -448,9 +448,11 @@ SpefReader::dspfBegin(Net *net,
     if (increment_
 	&& parasitics_->findParasiticNetwork(net, ap_))
       parasitic_ = nullptr;
-    else
+    else {
+      parasitics_->deleteReducedParasitics(net, ap_);
       parasitic_ = parasitics_->makeParasiticNetwork(net, pin_cap_included_,
-						     ap_);
+                                                     ap_);
+    }
     net_ = net;
   }
   else {