diff --git a/src/core/api/retention.go b/src/core/api/retention.go
index 1a14bfdaa..07bc013b2 100644
--- a/src/core/api/retention.go
+++ b/src/core/api/retention.go
@@ -238,7 +238,7 @@ func (r *RetentionAPI) checkRuleConflict(p *policy.Metadata) error {
 		if old, exists := temp[string(bs)]; exists {
 			return fmt.Errorf("rule %d is conflict with rule %d", n, old)
 		}
-		temp[string(bs)] = tid
+		temp[string(bs)] = n
 		rule.ID = tid
 	}
 	return nil