# A copy of AuthenticatedSystem has been removed from the module tree but is still active!

**URL:** <https://www.ruby-forum.com/t/a-copy-of-authenticatedsystem-has-been-removed-from-the-module-tree-but-is-still-active/143230>\
**Category:** Rails\
**Created:** [July 16, 2008, 4:35pm UTC](https://www.ruby-forum.com/t/a-copy-of-authenticatedsystem-has-been-removed-from-the-module-tree-but-is-still-active/143230 "2008-07-16T16:35:58Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![jordelver](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/9dc877/32.png) [@jordelver](https://www.ruby-forum.com/u/jordelver)\
**Post date:** [July 16, 2008, 4:35pm UTC](https://www.ruby-forum.com/t/a-copy-of-authenticatedsystem-has-been-removed-from-the-module-tree-but-is-still-active/143230/1 "2008-07-16T16:35:58Z")

</div>

Hmm, this is a weird one. I just started up script/server today to get  
this error when browsing around.

“A copy of AuthenticatedSystem has been removed from the module tree  
but is still active!”

Any ideas? I’ve googled, but the results that show all seem to refer  
to Rails 1.\*

I don’t think I’ve changed anything that would affect this.

I’m using Rails 2.0.2 and acts\_as\_authenticated.

Cheers,  
Jordan