user registration error

Hi,

For testing purpose i disable hikashop user registration (plug in 'Redirect Joomla registration to HikaShop Plugin' is disable).
during standard user registration (std joomla form) i get the following warning message:
Registration failed: Registration failed: Unknown column 'Array' in 'field list' SQL=INSERT INTO `j25_user_usergroup_map` (`user_id`,`group_id`) VALUES (52, Array)

user account is created but it shouldn't show any warning message.
From where is coming this problem ?
thx

Wait, that's a joomla error, no a HikaShop one... I don't know where that would come from.
Maybe one of the user plugins ?

unfortunately it's on my local computer... so no link.
i also thought about sync plug in but with or without i have the same issue

i search over internet and didn't find something similar even on joomla forum

I found today morning some post in Joomla forum where a person had the same issue as mine but i don't know if he uses hikashop or any plugins...
someone from Joomla forum suggest that maybe Hikashop plug-ins still uses ACL after disactivation...
see post: post on Joomla Forum

Ok, so i found the source of problem.

in fact a long time ago i installed Joomfish for j2.5 but it was before alpha version...
after upgrade to j2.5.4 it seems it raises such issue.