Your credit score is affected by your own finances and debts, as well as any financial associations you have.
The only way someone else’s assets/debts will affect your score is if you have a joint credit account or have made a joint credit application with that person.
This is called a financial connection/association.
If you are financially connected to someone, their information may affect a lender's decision about you. If you’re no longer financially connected with the person named in your report, you should get this changed.
We are unable to change this for you as we receive your report and score from Equifax. You’ll need to fill in our dispute form so that you can get this changed with Equifax directly: raise a dispute
If you’ve never made a joint application or had a joint account with that person – you should let Equifax know about this error on the dispute form.