reputation automatically at 10 after import for all members

Hello

after importing from vbulletin 3.8,   at ip4.   reputation automatically is at 10 for all members . ( all 18.000 active registered members)

I want to reset it to 0. 

I have removed reputation levels. (dont want them right now)

after searching i couldnt find a way to do that- how can I remove those automatic 10points ? 

thank you!