diff --git a/llvm-toolset-17.spec b/llvm-toolset-17.spec
index 554191bd66e15a1f734656bcfd5f904ac4ca4ab7..9bd965b090814e412fc5ee7834594fc3c7a4a85c 100644
--- a/llvm-toolset-17.spec
+++ b/llvm-toolset-17.spec
@@ -150,7 +150,7 @@
 #region main package
 Name:		  llvm-toolset-%{maj_ver}
 Version:	%{maj_ver}.%{min_ver}.%{patch_ver}
-Release:	7
+Release:	8
 Summary:	The Low Level Virtual Machine
 
 License:	NCSA
@@ -456,6 +456,8 @@ Requires:	%{pkg_name_clang}-tools-extra = %{version}-%{release}
 Requires:	git
 Requires:	python3
 
+Obsoletes:%{?scl_prefix}git-clang-format17 < %{version}-%{release}
+
 %description -n %{?scl_prefix}git-clang-format
 clang-format integration for git.
 
@@ -501,6 +503,7 @@ Requires: %{pkg_name_llvm}-libs%{?_isa} = %{version}-%{release}
 Requires: elfutils-libelf
 
 Provides: libomp(major) = %{maj_ver}
+Obsoletes: %{?scl_prefix}libomp < %{version}-%{release}
 
 %description -n %{pkg_name_libomp}
 OpenMP runtime for clang.
@@ -514,6 +517,7 @@ Requires: %{pkg_name_libomp}%{?_isa} = %{version}-%{release}
 Requires: %{pkg_name_clang}-resource-filesystem%{?_isa} = %{version}-%{release}
 
 Provides: libomp-devel(major) = %{maj_ver}
+Obsoletes: %{?scl_prefix}libomp-devel < %{version}-%{release}
 
 %description  -n %{pkg_name_libomp}-devel
 OpenMP header files.
@@ -2772,6 +2776,9 @@ fi
 #endregion files
 
 %changelog
+* Mon Mar 24 2025 liyunfei liyunfei33@huawei.com - 17.0.6-8
+- Add obsoletes for old version libomp and git-clang-format17
+
 * Mon Mar 17 2025 liyunfei liyunfei33@huawei.com - 17.0.6-7
 - update to llvm-for-oE-17.0.6-2503.0.2