THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
...
then we could get error stack, like this:
9. Do not use admin set config in regression test
Do not use admin set frontend config any more because it will modify FE's config. In github's workflow, the test is running in a single thread.
So that it is not a problem. But in daily test, the regression test is running in multiple threads. If we modify fe's config, it will affect other regression
test. The test case will fail.