Yes it is a problem and No it is not. depends, IF your father Ebay is a business account and his PayPal is not limited, yes you can add new PayPal but you will need to talk to PayPal not Ebay, to Explain why you changed your PayPal in your Father Ebay.
But if your father PayPal is limited then NO you can not change your PayPal in your Ebay because it will get limited as well.
But over all, changing name , address and telephone number on Ebay will lead to suspending this account, Ebay will think someone hijacked the account.
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