diff --git a/src/api_s2c/ApiSyncBtn.ts b/src/api_s2c/ApiSyncBtn.ts
index 959eb6e..7b3308a 100644
--- a/src/api_s2c/ApiSyncBtn.ts
+++ b/src/api_s2c/ApiSyncBtn.ts
@@ -69,7 +69,7 @@ export default async function (call: ApiCall<ReqSyncBtn, ResSyncBtn>) {
                     data[key] = {active: false};
                 } else {
                     let zls = await G.mongodb.collection('scheduler').findOne({type: 'zhanling'});
-                    if (!data[key] || data[key].round != zls.round) {
+                    if (!data[key] || data[key].round != zls?.round) {
                         let lastRunTime = zls && zls.lastRunTime? zls.lastRunTime : G.time
                         let round = zls && zls.lastRunTime? zls.round : 1
                         data[key] = {active: true, sTime: lastRunTime, round: round};