diff --git a/ChangeLog.txt b/ChangeLog.txt
index 53a5b5436..494bd6bc9 100644
--- a/ChangeLog.txt
+++ b/ChangeLog.txt
@@ -1,5 +1,6 @@
 # Version 0.6.2 (unreleased)
 - [#903] Bug in tool Cut Spline path.
+- [#905] Valentina crashes with error: This id is not unique.
 
 # Version 0.6.1 October 23, 2018
 - [#885] Regression. Broken support for multi size measurements.
diff --git a/src/libs/ifc/xml/vdomdocument.cpp b/src/libs/ifc/xml/vdomdocument.cpp
index 0533fe49b..4841f683d 100644
--- a/src/libs/ifc/xml/vdomdocument.cpp
+++ b/src/libs/ifc/xml/vdomdocument.cpp
@@ -272,6 +272,11 @@ bool VDomDocument::find(QHash<quint32, QDomElement> &cache, const QDomElement &n
     {
         const quint32 elementId = GetParametrUInt(node, AttrId, NULL_ID_STR);
 
+        if (cache.contains(elementId))
+        {
+            qWarning() << tr("Not unique id (%1)").arg(elementId);
+        }
+
         cache.insert(elementId, node);
         if (elementId == id)
         {
@@ -596,7 +601,7 @@ void VDomDocument::CollectId(const QDomElement &node, QVector<quint32> &vector)
         const quint32 id = GetParametrId(node);
         if (vector.contains(id))
         {
-            throw VExceptionWrongId(QString("This id (%1) is not unique.").arg(id), node);
+            throw VExceptionWrongId(tr("This id (%1) is not unique.").arg(id), node);
         }
         vector.append(id);
     }
diff --git a/src/libs/vtools/tools/drawTools/vdrawtool.cpp b/src/libs/vtools/tools/drawTools/vdrawtool.cpp
index dcd82b5d4..654cb3037 100644
--- a/src/libs/vtools/tools/drawTools/vdrawtool.cpp
+++ b/src/libs/vtools/tools/drawTools/vdrawtool.cpp
@@ -40,6 +40,7 @@
 #include "../ifc/ifcdef.h"
 #include "../ifc/xml/vdomdocument.h"
 #include "../ifc/xml/vabstractpattern.h"
+#include "../ifc/exception/vexceptionwrongid.h"
 #include "../../undocommands/addtocalc.h"
 #include "../../undocommands/savetooloptions.h"
 #include "../qmuparser/qmuparsererror.h"
@@ -229,6 +230,12 @@ void VDrawTool::ChangeLabelVisibility(quint32 id, bool visible)
  */
 void VDrawTool::AddToCalculation(const QDomElement &domElement)
 {
+    const QDomElement duplicate = doc->elementById(m_id);
+    if (not duplicate.isNull())
+    {
+        throw VExceptionWrongId(tr("This id (%1) is not unique.").arg(m_id), duplicate);
+    }
+
     AddToCalc *addToCal = new AddToCalc(domElement, doc);
     connect(addToCal, &AddToCalc::NeedFullParsing, doc, &VAbstractPattern::NeedFullParsing);
     qApp->getUndoStack()->push(addToCal);
diff --git a/src/libs/vtools/tools/nodeDetails/vabstractnode.cpp b/src/libs/vtools/tools/nodeDetails/vabstractnode.cpp
index 9b4db29e8..6cdcc3da5 100644
--- a/src/libs/vtools/tools/nodeDetails/vabstractnode.cpp
+++ b/src/libs/vtools/tools/nodeDetails/vabstractnode.cpp
@@ -37,6 +37,7 @@
 
 #include "../ifc/ifcdef.h"
 #include "../ifc/xml/vabstractpattern.h"
+#include "../ifc/exception/vexceptionwrongid.h"
 #include "../vgeometry/vgobject.h"
 #include "../vmisc/vabstractapplication.h"
 #include "../vmisc/def.h"
@@ -175,6 +176,12 @@ void VAbstractNode::ToolCreation(const Source &typeCreation)
  */
 void VAbstractNode::AddToModeling(const QDomElement &domElement)
 {
+    const QDomElement duplicate = doc->elementById(m_id);
+    if (not duplicate.isNull())
+    {
+        throw VExceptionWrongId(tr("This id (%1) is not unique.").arg(m_id), duplicate);
+    }
+
     QDomElement modeling;
     if (m_drawName.isEmpty())
     {
diff --git a/src/libs/vtools/tools/nodeDetails/vtoolpin.cpp b/src/libs/vtools/tools/nodeDetails/vtoolpin.cpp
index 32b42e305..201be9e06 100644
--- a/src/libs/vtools/tools/nodeDetails/vtoolpin.cpp
+++ b/src/libs/vtools/tools/nodeDetails/vtoolpin.cpp
@@ -69,6 +69,7 @@ VToolPin *VToolPin::Create(VToolPinInitData initData)
         catch (const VExceptionBadId &e)
         { // Possible case. Parent was deleted, but the node object is still here.
             Q_UNUSED(e)
+            initData.data->UpdateId(initData.id);
             return nullptr;// Just ignore
         }
         VPointF *pinPoint = new VPointF(*point);
diff --git a/src/libs/vtools/tools/nodeDetails/vtoolplacelabel.cpp b/src/libs/vtools/tools/nodeDetails/vtoolplacelabel.cpp
index bbac16b57..c82ae5eb5 100644
--- a/src/libs/vtools/tools/nodeDetails/vtoolplacelabel.cpp
+++ b/src/libs/vtools/tools/nodeDetails/vtoolplacelabel.cpp
@@ -97,6 +97,7 @@ VToolPlaceLabel *VToolPlaceLabel::Create(VToolPlaceLabelInitData &initData)
         catch (const VExceptionBadId &e)
         { // Possible case. Parent was deleted, but the node object is still here.
             Q_UNUSED(e)
+            initData.data->UpdateId(initData.id);
             return nullptr;// Just ignore
         }
         node->setName(point->name());
diff --git a/src/libs/vtools/tools/vtoolseamallowance.cpp b/src/libs/vtools/tools/vtoolseamallowance.cpp
index 44f8f10fd..98e696dc5 100644
--- a/src/libs/vtools/tools/vtoolseamallowance.cpp
+++ b/src/libs/vtools/tools/vtoolseamallowance.cpp
@@ -44,6 +44,7 @@
 #include "../vgeometry/vsplinepath.h"
 #include "../vgeometry/vplacelabelitem.h"
 #include "../ifc/xml/vpatternconverter.h"
+#include "../ifc/exception/vexceptionwrongid.h"
 #include "../undocommands/addpiece.h"
 #include "../undocommands/deletepiece.h"
 #include "../undocommands/movepiece.h"
@@ -962,6 +963,12 @@ void VToolSeamAllowance::FullUpdateFromGuiApply()
 //---------------------------------------------------------------------------------------------------------------------
 void VToolSeamAllowance::AddToFile()
 {
+    const QDomElement duplicate = doc->elementById(m_id);
+    if (not duplicate.isNull())
+    {
+        throw VExceptionWrongId(tr("This id (%1) is not unique.").arg(m_id), duplicate);
+    }
+
     const VPiece piece = VAbstractTool::data.GetPiece(m_id);
 
     QDomElement domElement = doc->createElement(getTagName());
diff --git a/src/libs/vtools/tools/vtooluniondetails.cpp b/src/libs/vtools/tools/vtooluniondetails.cpp
index ef9b10a11..3ae47fa0f 100644
--- a/src/libs/vtools/tools/vtooluniondetails.cpp
+++ b/src/libs/vtools/tools/vtooluniondetails.cpp
@@ -45,6 +45,7 @@
 #include "../ifc/xml/vabstractconverter.h"
 #include "../ifc/xml/vdomdocument.h"
 #include "../ifc/xml/vpatternconverter.h"
+#include "../ifc/exception/vexceptionwrongid.h"
 #include "../vgeometry/varc.h"
 #include "../vgeometry/vellipticalarc.h"
 #include "../vgeometry/vsplinepath.h"
@@ -1835,6 +1836,12 @@ void VToolUnionDetails::AddDetail(QDomElement &domElement, const VPiece &d) cons
  */
 void VToolUnionDetails::AddToModeling(const QDomElement &domElement)
 {
+    const QDomElement duplicate = doc->elementById(m_id);
+    if (not duplicate.isNull())
+    {
+        throw VExceptionWrongId(tr("This id (%1) is not unique.").arg(m_id), duplicate);
+    }
+
     const QString drawName = DrawName(doc, d1id, d2id);
     SCASSERT(not drawName.isEmpty())