diff --git a/packages/plugins/plugin-cert/src/plugin/cert-plugin/acme.ts b/packages/plugins/plugin-cert/src/plugin/cert-plugin/acme.ts
index 550b7f2a..070847ff 100644
--- a/packages/plugins/plugin-cert/src/plugin/cert-plugin/acme.ts
+++ b/packages/plugins/plugin-cert/src/plugin/cert-plugin/acme.ts
@@ -144,7 +144,7 @@ export class AcmeService {
       accountKey: conf.key,
       accountUrl: conf.accountUrl,
       externalAccountBinding: this.eab,
-      backoffAttempts: 15,
+      backoffAttempts: 20,
       backoffMin: 5000,
       backoffMax: 10000,
       urlMapping,
diff --git a/packages/ui/certd-server/src/modules/cname/service/cname-record-service.ts b/packages/ui/certd-server/src/modules/cname/service/cname-record-service.ts
index 6ab14b35..8a70ae02 100644
--- a/packages/ui/certd-server/src/modules/cname/service/cname-record-service.ts
+++ b/packages/ui/certd-server/src/modules/cname/service/cname-record-service.ts
@@ -58,7 +58,7 @@ export class CnameRecordService extends BaseService<CnameRecordEntity> {
     if (param.domain.startsWith('*.')) {
       param.domain = param.domain.substring(2);
     }
-    const info = await this.getRepository().findOne({ where: { domain: param.domain } });
+    const info = await this.getRepository().findOne({ where: { domain: param.domain,userId: param.userId } });
     if (info) {
       return info;
     }