镇念塔：修复更新bug

shared/db/TowerRecord.ts

@@ -36,6 +36,7 @@ export default class TowerRecord extends BaseModel {
   public static async createRecord(towerInfo: {roleId: string, lv: number, warStatus: Array<WarStatus>}, lean = true) {
     const recDoc = new TowerRecordModel();
     const update = Object.assign(recDoc.toJSON(), towerInfo );
+    delete update._id;
     const { roleId, lv } = towerInfo;
     // console.log(JSON.stringify(towerInfo))
     let rec: TowerRecordType = await TowerRecordModel.findOneAndUpdate({roleId, lv}, {$set: update}, {upsert: true, new: true}).lean(lean);