问FIREBASE致命错误:多次初始化数据库

EN

import * as functions from "firebase-functions";
import * as admin from "firebase-admin";
const app = admin.app();

export const onStart = 
functions.database.instance('my-db-1')
        .ref('path')
        .onCreate(async (snapshot, context) => {
    return await onCreate('my-db-1',snapshot,context);
        });
 export const onStartDb01 = functions.database.instance('my-db-2')
        .ref('path')
        .onCreate(async (snapshot, context) => {
            return await onCreate('my-db-2', snapshot, context);
        });

async function onCreate(dbInstance: string, snapshot: 
functions.database.DataSnapshot, context: functions.EventContext): 
Promise<any> {
    const defaultDb = app.database(defaultDbUrl);
    const actvDb = app.database(actvDbUrl);

    await defaultDb.ref('path')
        .once("value")
        .then(snap => {
        const val = snap.val();
         ---do something and write back---
       });
    await actvDb.ref('path')
        .once("value")
        .then(snap => {
        const val = snap.val();
        ---do something and write back---
    });
    return true;    
 }