My b2evolution Version: 2.x

When inserting Tags into a post B2evo take care of tags with case sensistive by default. so if i insert Rice or rice in 2 diferent post, in the latest i receive this error :

Additional information about this error:

MySQL error!

Duplicate entry 'rice' for key 2(Errno=1062)

Your query: insert new tags

INSERT INTO evo_items__tag( tag_name )

VALUES ( 'vegan' ),( 'bio' )

Then if i change the Tag "rice" to "Rice" with a big R
the post is recorded successfuly and everything is fine.

The problem is, how am i going to remember each time how i recorded a tag into the system ? I think it would be fine to have B2evo to deal with tags without case sensitive, so rice and Rice would be the same and this problem would be gone..

Any other idea ?