Sharepoint 2010 Content Deployemnt Job issue with duplicate fields in User information List

Hi friends,

I am facing below issue with the content deployment job.

It was working earlier. But now since from couple of days all the content deployment jobs in production environment are failing with below error.

Field name already exists. The name used for this field is already used by another field in the list. Select another name and try again.

ObjectName="User Information List".

When I check the fields in User information list in targeted site, I found couple of columns are dupicate like "ask me about",first name","Last name" etc.

Do i Need to drop target site collection or recreate with fresh content deployment job.

Please suggest.

Please help .

Regards

Subrat