Google analytics tracking codes

[Anaksagor]

Hello everyone. recently I have encounted a problem: my partners cancelled me an access to the admin system of my google analytics accounts for all my sites. I want to settle new accounts for them, but it requires installation of the tracking code. at the same time i do not want to lose the previous statistics and to delete the code which is already installed.

so my question is, what will happen if there are two tracking codes on the page? will they conflict with each other?

when I read the status page on the new reports it says Note: We recommend that you do not include both tracking code snippets together on any given page. Doing so might generate inaccurate report data. You can, however, migrate select pages of your site to the new tracking code while the legacy code remains on others.

Can anyone explain me what it means and how to do it.
thank you.

[web_design_USA]

It means that you can't put two tracking codes on the same page. So, if you want to keep the old code in some pages, they stay as it is. For the pages where you insert the new code, erase the old tracking code.