(Breaking) Drag and Drop: commented out legacy name `ImGuiDragDropFlags_SourceAutoExpirePayload`. Use `ImGuiDragDropFlags_PayloadAutoExpire`.

docs/CHANGELOG.txt

diff --git a/docs/CHANGELOG.txt b/docs/CHANGELOG.txt
index 373da11..ed02e3f 100644
--- a/docs/CHANGELOG.txt
+++ b/docs/CHANGELOG.txt
@@ -45,6 +45,8 @@
   was obsoleted in 1.90.7 (May 2024). Use `ImGuiTreeNodeFlags_SpanLabelWidth`.
 - ColorEdit: obsoleted SetColorEditOptions() function added in 1.51 (June 2017) in
   of directly poking to io.ConfigColorEditFlags. More consistent and easier to discover.
+- Drag and Drop: commented out legacy name `ImGuiDragDropFlags_SourceAutoExpirePayload`
+  which obsoleted in 1.90.9 (July 2024). Use `ImGuiDragDropFlags_PayloadAutoExpire`.
 
 
 Other Changes:

imgui.cpp

diff --git a/imgui.cpp b/imgui.cpp
index 2954bd6..47c9389 100644
--- a/imgui.cpp
+++ b/imgui.cpp
@@ -395,6 +395,7 @@
  When you are not sure about an old symbol or function name, try using the Search/Find function of your IDE to look for comments or references in all imgui files.
  You can read releases logs https://github.com/ocornut/imgui/releases for more details.
 
+ - 2026/07/08 (1.92.9) - Drag and Drop: commented out legacy name `ImGuiDragDropFlags_SourceAutoExpirePayload` which obsoleted in 1.90.9 (July 2024). Use `ImGuiDragDropFlags_PayloadAutoExpire`.
  - 2026/07/06 (1.92.9) - ColorEdit: obsoleted SetColorEditOptions() function added in 1.51 (June 2017) in favor of directly poking to io.ConfigColorEditFlags. More consistent and easier to discover.
  - 2026/06/02 (1.92.9) - TreeNode: commented out legacy name ImGuiTreeNodeFlags_SpanTextWidth which was obsoleted in 1.90.7 (May 2024). Use ImGuiTreeNodeFlags_SpanLabelWidth instead.
  - 2026/05/07 (1.92.8) - DrawList: swapped the last two arguments of AddRect(), AddPolyline(), PathStroke().

imgui.h

diff --git a/imgui.h b/imgui.h
index d63544c..1fa4338 100644
--- a/imgui.h
+++ b/imgui.h
@@ -1503,7 +1503,7 @@
     ImGuiDragDropFlags_AcceptPeekOnly               = ImGuiDragDropFlags_AcceptBeforeDelivery | ImGuiDragDropFlags_AcceptNoDrawDefaultRect, // For peeking ahead and inspecting the payload before delivery.
 
 #ifndef IMGUI_DISABLE_OBSOLETE_FUNCTIONS
-    ImGuiDragDropFlags_SourceAutoExpirePayload = ImGuiDragDropFlags_PayloadAutoExpire, // Renamed in 1.90.9
+    //ImGuiDragDropFlags_SourceAutoExpirePayload = ImGuiDragDropFlags_PayloadAutoExpire, // Renamed in 1.90.9
 #endif
 };