diff --git a/sysmaster.spec b/sysmaster.spec
index ee1c8cb..43b65ae 100644
--- a/sysmaster.spec
+++ b/sysmaster.spec
@@ -16,7 +16,7 @@
 
 Name:           sysmaster 
 Version:        0.5.1
-Release:        7
+Release:        8
 Summary:        redesign and reimplement process1.
 
 License:        Mulan PSL v2
@@ -229,10 +229,16 @@ test -f /etc/sysmaster/system/sysinit.target.wants/udevd.service && unlink /etc/
 test -f /etc/sysmaster/system/sysinit.target.wants/udev-trigger.service && unlink /etc/sysmaster/system/sysinit.target.wants/udev-trigger.service || :
 
 %postun -n devmaster
-test -f /usr/lib/sysmaster/system/udevd.service && ln -s /usr/lib/sysmaster/system/udevd.service /etc/sysmaster/system/sysinit.target.wants/udevd.service || :
-test -f /usr/lib/sysmaster/system/udev-trigger.service && ln -s /usr/lib/sysmaster/system/udev-trigger.service /etc/sysmaster/system/sysinit.target.wants/udev-trigger.service || :
+if [ $1 -eq 0 ] ; then
+    test -f /usr/lib/sysmaster/system/udevd.service && ln -s /usr/lib/sysmaster/system/udevd.service /etc/sysmaster/system/sysinit.target.wants/udevd.service || :
+    test -f /usr/lib/sysmaster/system/udev-trigger.service && ln -s /usr/lib/sysmaster/system/udev-trigger.service /etc/sysmaster/system/sysinit.target.wants/udev-trigger.service || :
+fi
 
 %changelog
+* Fri Dec 15 2023 chenjiayi<chenjiayi22@huawei.com> - 0.5.1-8
+- avoid symlinks for udevd.service and udev-trigger.service residuals
+  during updating
+
 * Thu Dec 14 2023 zhangyao<zhangyao108@huawei.com> - 0.5.1-7
 - sync patches from upstream