Vladimir Davydov

BTW this was suggested during review: https://github.com/tarantool/tarantool/pull/6228#discussion_r678185169.

> @locker close #6138 as duplicate? I'm not sure it's the same. Fixing this issue wouldn't fix the examples from the commit description: ``` -- Can't create spaces with the...

Please remove the skip condition after the fix: https://github.com/tarantool/tarantool/blob/f5f061d051dc6268949bfcb141d211142282578d/test/engine-luatest/gh_10375_ddl_does_not_abort_unrelated_transactions_test.lua#L29

> How to exclude some upper-level parameter in this case? Reset them at a lower level.

> > > How to exclude some upper-level parameter in this case? > > > > > > Reset them at a lower level. > > Do you mean that?...

> I'm about a case when we don't want any values for a some property. Same as with the built-in parameters: remove it from the global level and define it...

Now, when the cluster helper was migrated to luatest (see `luatest.cluster`), it's a pure luatest bug.