add Obsoletes '< version' in spec

(cherry picked from commit df764f26c358703b3e1b52c431d6462989cb7954)

libdnet.spec

@@ -1,6 +1,6 @@
 Name:		libdnet
 Version:	1.12
-Release:	28
+Release:	29
 Summary:        Simple portable interface work with low-level networking routines
 
 License:	BSD
@@ -37,7 +37,7 @@ Requires:	%{name} = %{version}-%{release}
 %package -n python2-%{name}
 %{?python_provide:%python_provide python2-%{name}}
 Provides:	%{name}-python = %{version}-%{release}
-Obsoletes:	%{name}-python 
+Obsoletes:	%{name}-python < %{version}-%{release} 
 Summary:	Python bindings for %{name}
 Requires:	%{name} = %{version}-%{release}
 BuildRequires:	python2-devel
@@ -100,5 +100,11 @@ popd
 %{_mandir}/man8/*.8*
 
 %changelog
+* Fri Nov 18 2022 xingwei <xingwei14@h-partners.com> - 1.12-29
+- Type:bugfix
+- ID:NA
+- SUG:NA
+- DESC: add Obsoletes '< version' in spec
+
 * Thu Sep 12 2019 openEuler Buildteam <buildteam@openeuler.org> - 1.12 - 28
 - Package init