[TYPO3-mvc] multiple instances of one plugin on the same page

[Stephan Petzl]

hi there!

i have a page with two columns and one instance of my plugin in each of 
them:

one for the users profile image and one for the address info of the user.
when i edit the address and click "save" the post is received of each 
plugin instance.

as far as i see, this error is the consequence:
"#1238068475: The "existing object" is unknown to the persistence backend. "

is there any extbase-trick to circumvent this? i mean i could check for 
an tt_content.uid GET param, but i think, since this is a common use 
case, there should be some standardised way of doing it...

-- 
Best Regards
Stephan Petzl
http://www.ajado.com