diff --git a/internal/workflow/node-processor/apply_node.go b/internal/workflow/node-processor/apply_node.go
index 76f180f0..d600ebb1 100644
--- a/internal/workflow/node-processor/apply_node.go
+++ b/internal/workflow/node-processor/apply_node.go
@@ -120,10 +120,12 @@ func (n *applyNode) checkCanSkip(ctx context.Context, lastOutput *domain.Workflo
 		}
 
 		lastCertificate, _ := n.certRepo.GetByWorkflowNodeId(ctx, n.node.Id)
-		renewalInterval := time.Duration(currentNodeConfig.SkipBeforeExpiryDays) * time.Hour * 24
-		expirationTime := time.Until(lastCertificate.ExpireAt)
-		if lastCertificate != nil && expirationTime > renewalInterval {
-			return true, fmt.Sprintf("已申请过证书，且证书尚未临近过期（到期尚余 %d 天，预计距 %d 天时续期）", int(expirationTime.Hours()/24), currentNodeConfig.SkipBeforeExpiryDays)
+		if lastCertificate != nil {
+			renewalInterval := time.Duration(currentNodeConfig.SkipBeforeExpiryDays) * time.Hour * 24
+			expirationTime := time.Until(lastCertificate.ExpireAt)
+			if expirationTime > renewalInterval {
+				return true, fmt.Sprintf("已申请过证书，且证书尚未临近过期（到期尚余 %d 天，预计距 %d 天时续期）", int(expirationTime.Hours()/24), currentNodeConfig.SkipBeforeExpiryDays)
+			}
 		}
 	}