diff --git a/Help/dev/experimental.rst b/Help/dev/experimental.rst
index eac86ab04b..7328d7b157 100644
--- a/Help/dev/experimental.rst
+++ b/Help/dev/experimental.rst
@@ -18,7 +18,7 @@ C++20 Module APIs
 =================
 
 Variable: ``CMAKE_EXPERIMENTAL_CXX_MODULE_CMAKE_API``
-Value: ``aa1f7df0-828a-4fcd-9afc-2dc80491aca7``
+Value: ``bf70d4b0-9fb7-465c-9803-34014e70d112``
 
 In order to support C++20 modules, there are a number of behaviors that have
 CMake APIs to provide the required features to build and export them from a
diff --git a/Source/cmExperimental.cxx b/Source/cmExperimental.cxx
index 2f26627276..0a746a9f33 100644
--- a/Source/cmExperimental.cxx
+++ b/Source/cmExperimental.cxx
@@ -27,7 +27,7 @@ struct FeatureData
   bool Warned;
 } LookupTable[] = {
   // CxxModuleCMakeApi
-  { "aa1f7df0-828a-4fcd-9afc-2dc80491aca7",
+  { "bf70d4b0-9fb7-465c-9803-34014e70d112",
     "CMAKE_EXPERIMENTAL_CXX_MODULE_CMAKE_API",
     "CMake's C++ module support is experimental. It is meant only for "
     "experimentation and feedback to CMake developers.",
diff --git a/Tests/RunCMake/CXXModules/CMakeLists.txt b/Tests/RunCMake/CXXModules/CMakeLists.txt
index 88eb282072..640d67b8fa 100644
--- a/Tests/RunCMake/CXXModules/CMakeLists.txt
+++ b/Tests/RunCMake/CXXModules/CMakeLists.txt
@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 3.23)
 project(${RunCMake_TEST} NONE)
 
-set(CMAKE_EXPERIMENTAL_CXX_MODULE_CMAKE_API "aa1f7df0-828a-4fcd-9afc-2dc80491aca7")
+set(CMAKE_EXPERIMENTAL_CXX_MODULE_CMAKE_API "bf70d4b0-9fb7-465c-9803-34014e70d112")
 
 include(${RunCMake_TEST}.cmake)
diff --git a/Tests/RunCMake/CXXModules/examples/cxx-modules-rules.cmake b/Tests/RunCMake/CXXModules/examples/cxx-modules-rules.cmake
index ff7219a3a7..c17b5a4744 100644
--- a/Tests/RunCMake/CXXModules/examples/cxx-modules-rules.cmake
+++ b/Tests/RunCMake/CXXModules/examples/cxx-modules-rules.cmake
@@ -1,4 +1,4 @@
-set(CMAKE_EXPERIMENTAL_CXX_MODULE_CMAKE_API "aa1f7df0-828a-4fcd-9afc-2dc80491aca7")
+set(CMAKE_EXPERIMENTAL_CXX_MODULE_CMAKE_API "bf70d4b0-9fb7-465c-9803-34014e70d112")
 
 if (NOT EXISTS "${CMake_TEST_MODULE_COMPILATION_RULES}")
   message(FATAL_ERROR
diff --git a/Tests/RunCMake/CXXModules/examples/export-bmi-and-interface-build/test/CMakeLists.txt b/Tests/RunCMake/CXXModules/examples/export-bmi-and-interface-build/test/CMakeLists.txt
index d227e55acd..a3e55f6f07 100644
--- a/Tests/RunCMake/CXXModules/examples/export-bmi-and-interface-build/test/CMakeLists.txt
+++ b/Tests/RunCMake/CXXModules/examples/export-bmi-and-interface-build/test/CMakeLists.txt
@@ -1,7 +1,7 @@
 cmake_minimum_required(VERSION 3.24)
 project(cxx_modules_library NONE)
 
-set(CMAKE_EXPERIMENTAL_CXX_MODULE_CMAKE_API "aa1f7df0-828a-4fcd-9afc-2dc80491aca7")
+set(CMAKE_EXPERIMENTAL_CXX_MODULE_CMAKE_API "bf70d4b0-9fb7-465c-9803-34014e70d112")
 
 find_package(export_bmi_and_interfaces REQUIRED)
 
diff --git a/Tests/RunCMake/CXXModules/examples/export-bmi-and-interface-install/test/CMakeLists.txt b/Tests/RunCMake/CXXModules/examples/export-bmi-and-interface-install/test/CMakeLists.txt
index d46d28b997..0144b706b0 100644
--- a/Tests/RunCMake/CXXModules/examples/export-bmi-and-interface-install/test/CMakeLists.txt
+++ b/Tests/RunCMake/CXXModules/examples/export-bmi-and-interface-install/test/CMakeLists.txt
@@ -1,7 +1,7 @@
 cmake_minimum_required(VERSION 3.24)
 project(cxx_modules_library NONE)
 
-set(CMAKE_EXPERIMENTAL_CXX_MODULE_CMAKE_API "aa1f7df0-828a-4fcd-9afc-2dc80491aca7")
+set(CMAKE_EXPERIMENTAL_CXX_MODULE_CMAKE_API "bf70d4b0-9fb7-465c-9803-34014e70d112")
 
 find_package(export_bmi_and_interfaces REQUIRED)
 
diff --git a/Tests/RunCMake/CXXModules/examples/export-interface-build/test/CMakeLists.txt b/Tests/RunCMake/CXXModules/examples/export-interface-build/test/CMakeLists.txt
index 3cd156a7ba..bd2f2d4a16 100644
--- a/Tests/RunCMake/CXXModules/examples/export-interface-build/test/CMakeLists.txt
+++ b/Tests/RunCMake/CXXModules/examples/export-interface-build/test/CMakeLists.txt
@@ -1,7 +1,7 @@
 cmake_minimum_required(VERSION 3.24)
 project(cxx_modules_library NONE)
 
-set(CMAKE_EXPERIMENTAL_CXX_MODULE_CMAKE_API "aa1f7df0-828a-4fcd-9afc-2dc80491aca7")
+set(CMAKE_EXPERIMENTAL_CXX_MODULE_CMAKE_API "bf70d4b0-9fb7-465c-9803-34014e70d112")
 
 find_package(export_interfaces REQUIRED)
 
diff --git a/Tests/RunCMake/CXXModules/examples/export-interface-install/test/CMakeLists.txt b/Tests/RunCMake/CXXModules/examples/export-interface-install/test/CMakeLists.txt
index 71bf86c439..87451fe519 100644
--- a/Tests/RunCMake/CXXModules/examples/export-interface-install/test/CMakeLists.txt
+++ b/Tests/RunCMake/CXXModules/examples/export-interface-install/test/CMakeLists.txt
@@ -1,7 +1,7 @@
 cmake_minimum_required(VERSION 3.24)
 project(cxx_modules_library NONE)
 
-set(CMAKE_EXPERIMENTAL_CXX_MODULE_CMAKE_API "aa1f7df0-828a-4fcd-9afc-2dc80491aca7")
+set(CMAKE_EXPERIMENTAL_CXX_MODULE_CMAKE_API "bf70d4b0-9fb7-465c-9803-34014e70d112")
 
 find_package(export_interfaces REQUIRED)
 
diff --git a/Tests/RunCMake/CXXModules/examples/export-interface-no-properties-build/test/CMakeLists.txt b/Tests/RunCMake/CXXModules/examples/export-interface-no-properties-build/test/CMakeLists.txt
index 0c094aca85..5b6abc645e 100644
--- a/Tests/RunCMake/CXXModules/examples/export-interface-no-properties-build/test/CMakeLists.txt
+++ b/Tests/RunCMake/CXXModules/examples/export-interface-no-properties-build/test/CMakeLists.txt
@@ -1,7 +1,7 @@
 cmake_minimum_required(VERSION 3.24)
 project(cxx_modules_library NONE)
 
-set(CMAKE_EXPERIMENTAL_CXX_MODULE_CMAKE_API "aa1f7df0-828a-4fcd-9afc-2dc80491aca7")
+set(CMAKE_EXPERIMENTAL_CXX_MODULE_CMAKE_API "bf70d4b0-9fb7-465c-9803-34014e70d112")
 
 find_package(export_interfaces_no_properties REQUIRED)
 
diff --git a/Tests/RunCMake/CXXModules/examples/export-interface-no-properties-install/test/CMakeLists.txt b/Tests/RunCMake/CXXModules/examples/export-interface-no-properties-install/test/CMakeLists.txt
index 0c094aca85..5b6abc645e 100644
--- a/Tests/RunCMake/CXXModules/examples/export-interface-no-properties-install/test/CMakeLists.txt
+++ b/Tests/RunCMake/CXXModules/examples/export-interface-no-properties-install/test/CMakeLists.txt
@@ -1,7 +1,7 @@
 cmake_minimum_required(VERSION 3.24)
 project(cxx_modules_library NONE)
 
-set(CMAKE_EXPERIMENTAL_CXX_MODULE_CMAKE_API "aa1f7df0-828a-4fcd-9afc-2dc80491aca7")
+set(CMAKE_EXPERIMENTAL_CXX_MODULE_CMAKE_API "bf70d4b0-9fb7-465c-9803-34014e70d112")
 
 find_package(export_interfaces_no_properties REQUIRED)
 
diff --git a/Tests/RunCMake/target_sources/FileSetDefaultWrongTypeExperimental.cmake b/Tests/RunCMake/target_sources/FileSetDefaultWrongTypeExperimental.cmake
index 44f1626146..84e180243f 100644
--- a/Tests/RunCMake/target_sources/FileSetDefaultWrongTypeExperimental.cmake
+++ b/Tests/RunCMake/target_sources/FileSetDefaultWrongTypeExperimental.cmake
@@ -1,6 +1,6 @@
 enable_language(C)
 
-set(CMAKE_EXPERIMENTAL_CXX_MODULE_CMAKE_API "aa1f7df0-828a-4fcd-9afc-2dc80491aca7")
+set(CMAKE_EXPERIMENTAL_CXX_MODULE_CMAKE_API "bf70d4b0-9fb7-465c-9803-34014e70d112")
 
 add_library(lib1 STATIC empty.c)
 target_sources(lib1 PRIVATE FILE_SET UNKNOWN)
diff --git a/Tests/RunCMake/target_sources/FileSetWrongTypeExperimental.cmake b/Tests/RunCMake/target_sources/FileSetWrongTypeExperimental.cmake
index adf118568d..78e782d99b 100644
--- a/Tests/RunCMake/target_sources/FileSetWrongTypeExperimental.cmake
+++ b/Tests/RunCMake/target_sources/FileSetWrongTypeExperimental.cmake
@@ -1,6 +1,6 @@
 enable_language(C)
 
-set(CMAKE_EXPERIMENTAL_CXX_MODULE_CMAKE_API "aa1f7df0-828a-4fcd-9afc-2dc80491aca7")
+set(CMAKE_EXPERIMENTAL_CXX_MODULE_CMAKE_API "bf70d4b0-9fb7-465c-9803-34014e70d112")
 
 add_library(lib1 STATIC empty.c)
 target_sources(lib1 PRIVATE FILE_SET a TYPE UNKNOWN)