Worksheet name uniqueness doesn't apply to itself

This constraint would prevent you from creating a new worksheet
with the name that it would have gotten by default.

1 files changed, 2 insertions, 2 deletions

diff --git a/lib/axlsx/workbook/worksheet/worksheet.rb b/lib/axlsx/workbook/worksheet/worksheet.rb
index b02af18e..5f650263 100644
--- a/lib/axlsx/workbook/worksheet/worksheet.rb
+++ b/lib/axlsx/workbook/worksheet/worksheet.rb
@@ -637,14 +637,14 @@ module Axlsx
         end
         sheet_view.show_outline_symbols = true
       end
-
     end
+
     def validate_sheet_name(name)
       DataTypeValidator.validate "Worksheet.name", String, name
       raise ArgumentError, (ERR_SHEET_NAME_TOO_LONG % name) if name.size > 31
       raise ArgumentError, (ERR_SHEET_NAME_CHARACTER_FORBIDDEN % name) if '[]*/\?:'.chars.any? { |char| name.include? char }
       name = Axlsx::coder.encode(name)
-      sheet_names = @workbook.worksheets.map { |s| s.name }
+      sheet_names = @workbook.worksheets.reject { |s| s == self }.map { |s| s.name }
       raise ArgumentError, (ERR_DUPLICATE_SHEET_NAME % name) if sheet_names.include?(name)
     end