If they conflict then it's a separate "story". They couldn't be part of the same timeline. You don't end up with one big ball of mud test which tests everything in the app, you end up with N different tests based on what setup they need, each one doing as many asserts as is supported by that setup. Here it might be test1: delete account. Test2: test changing things on the account (email, profile picture, ...) and asserting that each of the changes work.
BUT obviously you can just test deleting the account at the end of the test that modifies the account.
SetAccountUserName(account, "New name");
GetAccount(account.id).UserName.Should().Be("New name");
BUT obviously you can just test deleting the account at the end of the test that modifies the account.
SetAccountUserName(account, "New name"); GetAccount(account.id).UserName.Should().Be("New name");
SetAccountEmail(account, "new@email"); GetAccount(account.id).Email.Should().Be("new@email");
DeleteAccount(account); GetAccount(account.id).Should().BeNull();
This is a working timeline