diff --git a/gala-anteater.spec b/gala-anteater.spec
index 3e06d9a..1f8797f 100644
--- a/gala-anteater.spec
+++ b/gala-anteater.spec
@@ -2,7 +2,7 @@
 
 Name:            gala-anteater
 Version:         1.0.1
-Release:         3
+Release:         4
 Summary:         A time-series anomaly detection platform for operating system.
 License:         MulanPSL2
 URL:             https://gitee.com/openeuler/gala-anteater
@@ -51,7 +51,9 @@ fi
 %systemd_preun gala-anteater.service
 
 %postun
-%systemd_postun_with_restart gala-anteater.service
+if [ -f "%{_unitdir}/gala-anteater.service" ] ; then
+	%systemd_postun_with_restart gala-anteater.service
+fi
 
 %files
 %doc README.md
@@ -75,6 +77,9 @@ fi
 
 
 %changelog
+* Fri Jan 20 2023 Zhen Chen <chenzhen126@huawei.com> - 1.0.1-4
+- eliminate 'Fail to try-restart' warning when downgrading to 1.0.1-1
+
 * Thu Jan 19 2023 Zhen Chen <chenzhen126@huawei.com> - 1.0.1-3
 - fix missing Requires:python3-pyyaml