diff --git a/src/libs/vtools/undocommands/savepieceoptions.cpp b/src/libs/vtools/undocommands/savepieceoptions.cpp
index 4a1e78c99..f96e27752 100644
--- a/src/libs/vtools/undocommands/savepieceoptions.cpp
+++ b/src/libs/vtools/undocommands/savepieceoptions.cpp
@@ -172,7 +172,10 @@ bool SavePieceOptions::mergeWith(const QUndoCommand *command)
         const QVector<VPieceNode> nodes = m_newDet.GetPath().GetNodes();
         const QVector<VPieceNode> candidateNodes = candidate.GetPath().GetNodes();
 
-        SCASSERT(nodes.size() == candidateNodes.size())
+        if (nodes.size() != candidateNodes.size())
+        {
+            return false;
+        }
 
         for (int i = 0; i < nodes.size(); ++i)
         {
diff --git a/src/libs/vtools/undocommands/savepiecepathoptions.cpp b/src/libs/vtools/undocommands/savepiecepathoptions.cpp
index 9c2fc6df1..de55b19a5 100644
--- a/src/libs/vtools/undocommands/savepiecepathoptions.cpp
+++ b/src/libs/vtools/undocommands/savepiecepathoptions.cpp
@@ -143,7 +143,10 @@ bool SavePiecePathOptions::mergeWith(const QUndoCommand *command)
         const QVector<VPieceNode> nodes = m_newPath.GetNodes();
         const QVector<VPieceNode> candidateNodes = candidate.GetNodes();
 
-        SCASSERT(nodes.size() == candidateNodes.size())
+        if (nodes.size() == candidateNodes.size())
+        {
+            return false;
+        }
 
         for (int i = 0; i < nodes.size(); ++i)
         {