diff --git a/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorkbook_Save.NestedTypes.cs b/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorkbook_Save.NestedTypes.cs
index de578ec..99d3ead 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorkbook_Save.NestedTypes.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorkbook_Save.NestedTypes.cs
@@ -81,7 +81,7 @@
                     _relIds.Add(relType, new List<String>());
                 }
 
-                Int32 id = 1;
+                Int32 id = _relIds[relType].Count + 1;
                 while (true)
                 {
                     String relId = String.Format("rId{0}", id);
diff --git a/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorkbook_Save.cs b/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorkbook_Save.cs
index 8a4d128..9253267 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorkbook_Save.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorkbook_Save.cs
@@ -133,7 +133,7 @@
 
             foreach (XLWorksheet worksheet in WorksheetsInternal.Cast<XLWorksheet>().OrderBy(w => w.Position))
             {
-                //context.RelIdGenerator.Reset(RelType.Worksheet);
+                //context.RelIdGenerator.Reset(RelType.);
                 WorksheetPart worksheetPart;
                 string wsRelId = worksheet.RelId;
                 if (workbookPart.Parts.Any(p => p.RelationshipId == wsRelId))