NAV 2009r2 to 2015 upgrading, update data error

I currently work on upgrading NAV from 2009r2 to 2015

Everything going great unitl I try to update data.

I ran "Data update" and process stoped by error "Choose a valid field in the Contact table" for one of 7 companies.

I try to continue updating and ignore this error, then other companies all error "The source Code already exists. Identification fields and values : Code = 'PAYNTRECON' ".

So sad I couldnt debug the update code (At least I didnt know how.)

Stucked in this error several days, any one has clue what problem this is and how i can fix it.