项目中examples包下的例子报Error: Your database lower_case_table_names=1, please add DB_UNDERSCORED=true to the .env file

在examples/app/single-app.ts文件中,按照文件中注释的执行步骤yarn run:example app/single-app start 控制台出现
[error] Your database lower_case_table_names=1, please add DB_UNDERSCORED=true to the .env file stack=Error: Your database lower_case_table_names=1, please add DB_UNDERSCORED=true to the .env file

但实际上.env 文件中已经添加了DB_UNDERSCORED=true