云开发出现502005，是怎么回事？

Error: errCode: -502005 database collection not exists | errMsg: [ResourceNotFound] Db or Table not exist. Please check your request, but if the problem cannot be solved, contact us.;

at Object.returnAsCloudSDKError (/var/user/node_modules/wx-server-sdk/index.js:6052:16)

at Object.checkError (/var/user/node_modules/wx-server-sdk/index.js:1378:23)

at Promise (/var/user/node_modules/wx-server-sdk/index.js:1446:33)

at <anonymous>

at process._tickCallback (internal/process/next_tick.js:188:7)

怎么回事呢？