diff --git a/components/esm/aipackage.cpp b/components/esm/aipackage.cpp
index cf4951de7..209a1fe26 100644
--- a/components/esm/aipackage.cpp
+++ b/components/esm/aipackage.cpp
@@ -13,6 +13,7 @@ namespace ESM
 
     void AIPackageList::load(ESMReader &esm)
     {
+        mList.clear();
         while (esm.hasMoreSubs()) {
             // initialize every iteration
             AIPackage pack;
diff --git a/components/esm/effectlist.cpp b/components/esm/effectlist.cpp
index bc126846b..fc9acccf2 100644
--- a/components/esm/effectlist.cpp
+++ b/components/esm/effectlist.cpp
@@ -7,6 +7,7 @@ namespace ESM {
 
 void EffectList::load(ESMReader &esm)
 {
+    mList.clear();
     ENAMstruct s;
     while (esm.isNextSub("ENAM")) {
         esm.getHT(s, 24);
diff --git a/components/esm/loadarmo.cpp b/components/esm/loadarmo.cpp
index 5bf38c840..f8c3a4718 100644
--- a/components/esm/loadarmo.cpp
+++ b/components/esm/loadarmo.cpp
@@ -9,6 +9,7 @@ namespace ESM
 
 void PartReferenceList::load(ESMReader &esm)
 {
+    mParts.clear();
     while (esm.isNextSub("INDX"))
     {
         PartReference pr;
diff --git a/components/esm/loadcont.cpp b/components/esm/loadcont.cpp
index 7bdf9f05b..51a385f06 100644
--- a/components/esm/loadcont.cpp
+++ b/components/esm/loadcont.cpp
@@ -9,6 +9,7 @@ namespace ESM
 
 void InventoryList::load(ESMReader &esm)
 {
+    mList.clear();
     ContItem ci;
     while (esm.isNextSub("NPCO"))
     {
diff --git a/components/esm/loadnpc.cpp b/components/esm/loadnpc.cpp
index 2fe9fe3c1..ef4b5211b 100644
--- a/components/esm/loadnpc.cpp
+++ b/components/esm/loadnpc.cpp
@@ -51,6 +51,7 @@ void NPC::load(ESMReader &esm)
     else
         mHasAI = false;
 
+    mTransport.clear();
     while (esm.isNextSub("DODT") || esm.isNextSub("DNAM")) {
         if (esm.retSubName() == 0x54444f44) { // DODT struct
             Dest dodt;
diff --git a/components/esm/loadpgrd.cpp b/components/esm/loadpgrd.cpp
index efdbdd86b..974e928d9 100644
--- a/components/esm/loadpgrd.cpp
+++ b/components/esm/loadpgrd.cpp
@@ -27,6 +27,9 @@ void Pathgrid::load(ESMReader &esm)
     esm.getHNT(mData, "DATA", 12);
     mCell = esm.getHNString("NAME");
 
+    mPoints.clear();
+    mEdges.clear();
+
     // keep track of total connections so we can reserve edge vector size
     int edgeCount = 0;
 
diff --git a/components/esm/loadregn.cpp b/components/esm/loadregn.cpp
index 0c3ccbffb..1b08b7217 100644
--- a/components/esm/loadregn.cpp
+++ b/components/esm/loadregn.cpp
@@ -39,6 +39,7 @@ void Region::load(ESMReader &esm)
 
     esm.getHNT(mMapColor, "CNAM");
 
+    mSoundList.clear();
     while (esm.hasMoreSubs())
     {
         SoundRef sr;
diff --git a/components/esm/loadscpt.cpp b/components/esm/loadscpt.cpp
index 5a7d65775..19e3f3bb3 100644
--- a/components/esm/loadscpt.cpp
+++ b/components/esm/loadscpt.cpp
@@ -22,6 +22,8 @@ void Script::load(ESMReader &esm)
     mData = data.mData;
     mId = data.mName.toString();
 
+    mVarNames.clear();
+
     // List of local variables
     if (esm.isNextSub("SCVR"))
     {
diff --git a/components/esm/spelllist.cpp b/components/esm/spelllist.cpp
index 24d3c3d0a..aeface617 100644
--- a/components/esm/spelllist.cpp
+++ b/components/esm/spelllist.cpp
@@ -7,6 +7,7 @@ namespace ESM {
 
 void SpellList::load(ESMReader &esm)
 {
+    mList.clear();
     while (esm.isNextSub("NPCS")) {
         mList.push_back(esm.getHString());
     }