diff --git a/changelogs/unreleased/7445-allenxu404 b/changelogs/unreleased/7445-allenxu404
new file mode 100644
index 0000000000..051ff2e68a
--- /dev/null
+++ b/changelogs/unreleased/7445-allenxu404
@@ -0,0 +1 @@
+Adjust the logic for the backup_last_status metrics to stop incorrectly incrementing over time
\ No newline at end of file
diff --git a/pkg/metrics/metrics.go b/pkg/metrics/metrics.go
index b1bcaf765a..61b91812d8 100644
--- a/pkg/metrics/metrics.go
+++ b/pkg/metrics/metrics.go
@@ -468,7 +468,7 @@ func (m *ServerMetrics) InitSchedule(scheduleName string) {
 		c.WithLabelValues(scheduleName).Add(0)
 	}
 	if c, ok := m.metrics[backupLastStatus].(*prometheus.GaugeVec); ok {
-		c.WithLabelValues(scheduleName).Add(1)
+		c.WithLabelValues(scheduleName).Set(float64(1))
 	}
 	if c, ok := m.metrics[restoreAttemptTotal].(*prometheus.CounterVec); ok {
 		c.WithLabelValues(scheduleName).Add(0)