diff --git a/sql/mangos.sql b/sql/mangos.sql
index 3ab9a3d00..7f855ad9f 100644
--- a/sql/mangos.sql
+++ b/sql/mangos.sql
@@ -24,7 +24,7 @@ CREATE TABLE `db_version` (
   `version` varchar(120) default NULL,
   `creature_ai_version` varchar(120) default NULL,
   `cache_id` int(10) default '0',
-  `required_10746_01_mangos_mangos_string` bit(1) default NULL
+  `required_10749_01_mangos_mangos_string` bit(1) default NULL
 ) ENGINE=MyISAM DEFAULT CHARSET=utf8 ROW_FORMAT=FIXED COMMENT='Used DB version notes';
 
 --
diff --git a/sql/updates/10749_01_mangos_mangos_string.sql b/sql/updates/10749_01_mangos_mangos_string.sql
new file mode 100644
index 000000000..b54c66aae
--- /dev/null
+++ b/sql/updates/10749_01_mangos_mangos_string.sql
@@ -0,0 +1,6 @@
+ALTER TABLE db_version CHANGE COLUMN required_10746_01_mangos_mangos_string required_10749_01_mangos_mangos_string bit;
+
+DELETE FROM mangos_string WHERE entry IN (274);
+
+INSERT INTO mangos_string VALUES
+(274,'Game Object (GUID: %u) has references in not found owner %s GO list, can\'t be deleted.',NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL);
diff --git a/sql/updates/Makefile.am b/sql/updates/Makefile.am
index 380fd0f07..916ed42de 100644
--- a/sql/updates/Makefile.am
+++ b/sql/updates/Makefile.am
@@ -122,6 +122,7 @@ pkgdata_DATA = \
 	10743_01_mangos_spell_chain.sql \
 	10743_02_mangos_spell_bonus_data.sql \
 	10746_01_mangos_mangos_string.sql \
+	10749_01_mangos_mangos_string.sql \
 	README
 
 ## Additional files to include when running 'make dist'
@@ -224,4 +225,5 @@ EXTRA_DIST = \
 	10743_01_mangos_spell_chain.sql \
 	10743_02_mangos_spell_bonus_data.sql \
 	10746_01_mangos_mangos_string.sql \
+	10749_01_mangos_mangos_string.sql \
 	README
diff --git a/src/game/GameObject.cpp b/src/game/GameObject.cpp
index 6a693e8fe..2b63fb842 100644
--- a/src/game/GameObject.cpp
+++ b/src/game/GameObject.cpp
@@ -77,7 +77,7 @@ void GameObject::RemoveFromWorld()
     if(IsInWorld())
     {
         // Remove GO from owner
-        ObjectGuid owner_guid = GetOwnerGUID();
+        ObjectGuid owner_guid = GetOwnerGuid();
         if (!owner_guid.IsEmpty())
         {
             if (Unit* owner = ObjectAccessor::GetUnit(*this,owner_guid))
@@ -392,7 +392,7 @@ void GameObject::Update(uint32 /*p_time*/)
                 //any return here in case battleground traps
             }
 
-            if (GetOwnerGUID())
+            if (!GetOwnerGuid().IsEmpty())
             {
                 if (Unit* owner = GetOwner())
                     owner->RemoveGameObject(this, false);
@@ -667,7 +667,7 @@ bool GameObject::IsTransport() const
 
 Unit* GameObject::GetOwner() const
 {
-    return ObjectAccessor::GetUnit(*this, GetOwnerGUID());
+    return ObjectAccessor::GetUnit(*this, GetOwnerGuid());
 }
 
 void GameObject::SaveRespawnTime()
@@ -819,9 +819,9 @@ void GameObject::SummonLinkedTrapIfAny()
     linkedGO->SetRespawnTime(GetRespawnDelay());
     linkedGO->SetSpellId(GetSpellId());
 
-    if (GetOwnerGUID())
+    if (!GetOwnerGuid().IsEmpty())
     {
-        linkedGO->SetOwnerGUID(GetOwnerGUID());
+        linkedGO->SetOwnerGuid(GetOwnerGuid());
         linkedGO->SetUInt32Value(GAMEOBJECT_LEVEL, GetUInt32Value(GAMEOBJECT_LEVEL));
     }
 
@@ -1152,7 +1152,7 @@ void GameObject::Use(Unit* user)
 
             Player* player = (Player*)user;
 
-            if (player->GetGUID() != GetOwnerGUID())
+            if (player->GetObjectGuid() != GetOwnerGuid())
                 return;
 
             switch(getLootState())
@@ -1184,7 +1184,7 @@ void GameObject::Use(Unit* user)
                     {
                         // prevent removing GO at spell cancel
                         player->RemoveGameObject(this,false);
-                        SetOwnerGUID(player->GetGUID());
+                        SetOwnerGuid(player->GetObjectGuid());
 
                         //fish catched
                         player->UpdateFishingSkill();
diff --git a/src/game/GameObject.h b/src/game/GameObject.h
index d27af3952..4c795d1d8 100644
--- a/src/game/GameObject.h
+++ b/src/game/GameObject.h
@@ -611,12 +611,12 @@ class MANGOS_DLL_SPEC GameObject : public WorldObject
         bool LoadFromDB(uint32 guid, Map *map);
         void DeleteFromDB();
 
-        void SetOwnerGUID(uint64 owner)
+        void SetOwnerGuid(ObjectGuid ownerGuid)
         {
             m_spawnedByDefault = false;                     // all object with owner is despawned after delay
-            SetUInt64Value(OBJECT_FIELD_CREATED_BY, owner);
+            SetGuidValue(OBJECT_FIELD_CREATED_BY, ownerGuid);
         }
-        uint64 GetOwnerGUID() const { return GetUInt64Value(OBJECT_FIELD_CREATED_BY); }
+        ObjectGuid const& GetOwnerGuid() const { return GetGuidValue(OBJECT_FIELD_CREATED_BY); }
         Unit* GetOwner() const;
 
         void SetSpellId(uint32 id)
diff --git a/src/game/Level2.cpp b/src/game/Level2.cpp
index 1873c4abd..27bbe8d9d 100644
--- a/src/game/Level2.cpp
+++ b/src/game/Level2.cpp
@@ -906,13 +906,13 @@ bool ChatHandler::HandleGameObjectDeleteCommand(char* args)
         return false;
     }
 
-    uint64 owner_guid = obj->GetOwnerGUID();
-    if (owner_guid)
+    ObjectGuid ownerGuid = obj->GetOwnerGuid();
+    if (!ownerGuid.IsEmpty())
     {
-        Unit* owner = ObjectAccessor::GetUnit(*m_session->GetPlayer(),owner_guid);
-        if (!owner || !IS_PLAYER_GUID(owner_guid))
+        Unit* owner = ObjectAccessor::GetUnit(*m_session->GetPlayer(), ownerGuid);
+        if (!owner || !ownerGuid.IsPlayer())
         {
-            PSendSysMessage(LANG_COMMAND_DELOBJREFERCREATURE, GUID_LOPART(owner_guid), obj->GetGUIDLow());
+            PSendSysMessage(LANG_COMMAND_DELOBJREFERCREATURE, obj->GetGUIDLow(), ownerGuid.GetString().c_str());
             SetSentErrorMessage(true);
             return false;
         }
diff --git a/src/game/LootHandler.cpp b/src/game/LootHandler.cpp
index 04908a83c..cb17832f6 100644
--- a/src/game/LootHandler.cpp
+++ b/src/game/LootHandler.cpp
@@ -49,7 +49,7 @@ void WorldSession::HandleAutostoreLootItemOpcode( WorldPacket & recv_data )
             GameObject *go = player->GetMap()->GetGameObject(lguid);
 
             // not check distance for GO in case owned GO (fishing bobber case, for example) or Fishing hole GO
-            if (!go || ((go->GetOwnerGUID() != _player->GetGUID() && go->GetGoType() != GAMEOBJECT_TYPE_FISHINGHOLE) && !go->IsWithinDistInMap(_player,INTERACTION_DISTANCE)))
+            if (!go || ((go->GetOwnerGuid() != _player->GetObjectGuid() && go->GetGoType() != GAMEOBJECT_TYPE_FISHINGHOLE) && !go->IsWithinDistInMap(_player,INTERACTION_DISTANCE)))
             {
                 player->SendLootRelease(lguid);
                 return;
@@ -192,7 +192,7 @@ void WorldSession::HandleLootMoneyOpcode( WorldPacket & /*recv_data*/ )
             GameObject *pGameObject = GetPlayer()->GetMap()->GetGameObject(guid);
 
             // not check distance for GO in case owned GO (fishing bobber case, for example)
-            if( pGameObject && (pGameObject->GetOwnerGUID()==_player->GetGUID() || pGameObject->IsWithinDistInMap(_player,INTERACTION_DISTANCE)) )
+            if( pGameObject && (pGameObject->GetOwnerGuid() == _player->GetObjectGuid() || pGameObject->IsWithinDistInMap(_player,INTERACTION_DISTANCE)) )
                 pLoot = &pGameObject->loot;
 
             break;
@@ -319,7 +319,7 @@ void WorldSession::DoLootRelease(ObjectGuid lguid)
             GameObject *go = GetPlayer()->GetMap()->GetGameObject(lguid);
 
             // not check distance for GO in case owned GO (fishing bobber case, for example) or Fishing hole GO
-            if (!go || ((go->GetOwnerGUID() != _player->GetGUID() && go->GetGoType() != GAMEOBJECT_TYPE_FISHINGHOLE) && !go->IsWithinDistInMap(_player,INTERACTION_DISTANCE)))
+            if (!go || ((go->GetOwnerGuid() != _player->GetObjectGuid() && go->GetGoType() != GAMEOBJECT_TYPE_FISHINGHOLE) && !go->IsWithinDistInMap(_player,INTERACTION_DISTANCE)))
                 return;
 
             loot = &go->loot;
diff --git a/src/game/Object.cpp b/src/game/Object.cpp
index c99732a47..ccb3924f5 100644
--- a/src/game/Object.cpp
+++ b/src/game/Object.cpp
@@ -2073,7 +2073,7 @@ bool WorldObject::IsControlledByPlayer() const
     switch (GetTypeId())
     {
         case TYPEID_GAMEOBJECT:
-            return IS_PLAYER_GUID(((GameObject*)this)->GetOwnerGUID());
+            return ((GameObject*)this)->GetOwnerGuid().IsPlayer();
         case TYPEID_UNIT:
         case TYPEID_PLAYER:
             return ((Unit*)this)->IsCharmerOrOwnerPlayerOrPlayerItself();
diff --git a/src/game/Player.cpp b/src/game/Player.cpp
index 0e099727d..74838d3a6 100644
--- a/src/game/Player.cpp
+++ b/src/game/Player.cpp
@@ -7853,7 +7853,7 @@ void Player::SendLoot(ObjectGuid guid, LootType loot_type)
 
             // not check distance for GO in case owned GO (fishing bobber case, for example)
             // And permit out of range GO with no owner in case fishing hole
-            if (!go || (loot_type != LOOT_FISHINGHOLE && (loot_type != LOOT_FISHING || go->GetOwnerGUID() != GetGUID()) && !go->IsWithinDistInMap(this,INTERACTION_DISTANCE)))
+            if (!go || (loot_type != LOOT_FISHINGHOLE && (loot_type != LOOT_FISHING || go->GetOwnerGuid() != GetObjectGuid()) && !go->IsWithinDistInMap(this,INTERACTION_DISTANCE)))
             {
                 SendLootRelease(guid);
                 return;
diff --git a/src/game/SpellEffects.cpp b/src/game/SpellEffects.cpp
index 5ed7520d4..60cbd62b5 100644
--- a/src/game/SpellEffects.cpp
+++ b/src/game/SpellEffects.cpp
@@ -935,7 +935,7 @@ void Spell::EffectDummy(SpellEffectIndex eff_idx)
                     }
 
                     pGameObj->SetRespawnTime(creatureTarget->GetRespawnTime()-time(NULL));
-                    pGameObj->SetOwnerGUID(m_caster->GetGUID() );
+                    pGameObj->SetOwnerGuid(m_caster->GetObjectGuid() );
                     pGameObj->SetUInt32Value(GAMEOBJECT_LEVEL, m_caster->getLevel() );
                     pGameObj->SetSpellId(m_spellInfo->Id);
 
@@ -7889,7 +7889,7 @@ void Spell::EffectTransmitted(SpellEffectIndex eff_idx)
 
     pGameObj->SetRespawnTime(duration > 0 ? duration/IN_MILLISECONDS : 0);
 
-    pGameObj->SetOwnerGUID(m_caster->GetGUID());
+    pGameObj->SetOwnerGuid(m_caster->GetObjectGuid());
 
     pGameObj->SetUInt32Value(GAMEOBJECT_LEVEL, m_caster->getLevel());
     pGameObj->SetSpellId(m_spellInfo->Id);
diff --git a/src/game/Unit.cpp b/src/game/Unit.cpp
index f3df984d4..6e37aa755 100644
--- a/src/game/Unit.cpp
+++ b/src/game/Unit.cpp
@@ -3470,7 +3470,7 @@ void Unit::_UpdateSpells( uint32 time )
             //(*i)->Update( difftime );
             if( !(*ite1)->isSpawned() )
             {
-                (*ite1)->SetOwnerGUID(0);
+                (*ite1)->SetOwnerGuid(ObjectGuid());
                 (*ite1)->SetRespawnTime(0);
                 (*ite1)->Delete();
                 dnext1 = m_gameObj.erase(ite1);
@@ -4980,9 +4980,9 @@ GameObject* Unit::GetGameObject(uint32 spellId) const
 
 void Unit::AddGameObject(GameObject* gameObj)
 {
-    MANGOS_ASSERT(gameObj && gameObj->GetOwnerGUID()==0);
+    MANGOS_ASSERT(gameObj && gameObj->GetOwnerGuid().IsEmpty());
     m_gameObj.push_back(gameObj);
-    gameObj->SetOwnerGUID(GetGUID());
+    gameObj->SetOwnerGuid(GetObjectGuid());
 
     if ( GetTypeId()==TYPEID_PLAYER && gameObj->GetSpellId() )
     {
@@ -4996,9 +4996,9 @@ void Unit::AddGameObject(GameObject* gameObj)
 
 void Unit::RemoveGameObject(GameObject* gameObj, bool del)
 {
-    MANGOS_ASSERT(gameObj && gameObj->GetOwnerGUID()==GetGUID());
+    MANGOS_ASSERT(gameObj && gameObj->GetOwnerGuid() == GetObjectGuid());
 
-    gameObj->SetOwnerGUID(0);
+    gameObj->SetOwnerGuid(ObjectGuid());
 
     // GO created by some spell
     if (uint32 spellid = gameObj->GetSpellId())
@@ -5034,7 +5034,7 @@ void Unit::RemoveGameObject(uint32 spellid, bool del)
         next = i;
         if(spellid == 0 || (*i)->GetSpellId() == spellid)
         {
-            (*i)->SetOwnerGUID(0);
+            (*i)->SetOwnerGuid(ObjectGuid());
             if(del)
             {
                 (*i)->SetRespawnTime(0);
@@ -5053,7 +5053,7 @@ void Unit::RemoveAllGameObjects()
     // remove references to unit
     for(GameObjectList::iterator i = m_gameObj.begin(); i != m_gameObj.end();)
     {
-        (*i)->SetOwnerGUID(0);
+        (*i)->SetOwnerGuid(ObjectGuid());
         (*i)->SetRespawnTime(0);
         (*i)->Delete();
         i = m_gameObj.erase(i);
diff --git a/src/shared/revision_nr.h b/src/shared/revision_nr.h
index 40360e220..5e9698130 100644
--- a/src/shared/revision_nr.h
+++ b/src/shared/revision_nr.h
@@ -1,4 +1,4 @@
 #ifndef __REVISION_NR_H__
 #define __REVISION_NR_H__
- #define REVISION_NR "10748"
+ #define REVISION_NR "10749"
 #endif // __REVISION_NR_H__
diff --git a/src/shared/revision_sql.h b/src/shared/revision_sql.h
index 8fffd8680..a03b306ce 100644
--- a/src/shared/revision_sql.h
+++ b/src/shared/revision_sql.h
@@ -1,6 +1,6 @@
 #ifndef __REVISION_SQL_H__
 #define __REVISION_SQL_H__
  #define REVISION_DB_CHARACTERS "required_10664_01_characters_arena_team_stats"
- #define REVISION_DB_MANGOS "required_10746_01_mangos_mangos_string"
+ #define REVISION_DB_MANGOS "required_10749_01_mangos_mangos_string"
  #define REVISION_DB_REALMD "required_10008_01_realmd_realmd_db_version"
 #endif // __REVISION_SQL_H__