Reserve LuceneDev4003 for #1296
diff --git a/DiagnosticCategoryAndIdRanges.txt b/DiagnosticCategoryAndIdRanges.txt
index 0d5ab57..7a997fc 100644
--- a/DiagnosticCategoryAndIdRanges.txt
+++ b/DiagnosticCategoryAndIdRanges.txt
@@ -16,7 +16,7 @@
 Design: LuceneDev1000-LuceneDev1008
 Globalization: LuceneDev2000-LuceneDev2008
 Mobility:
-Performance: LuceneDev4000-LuceneDev4002
+Performance: LuceneDev4000-LuceneDev4003
 Security:
 Usage: LuceneDev6000-LuceneDev6005
 Naming: