[Neos] problem with remove media

[Piseth Sok]

Hi List,

I just remove media in backend of TYPO3 Neos, then I go to content view 
in backend I got error :

Fatal error: Call to a member function getHash() on a non-object in 
/home/test/public_html/Data/Temporary/Development/Cache/Code/Flow_Object_Classes/TYPO3_Media_Domain_Service_ImageService.php 
on line 66

Is there any ways to fix this?
I don't want to lose my content.

Any ideas?
Thanks