Thats not true. You can add multiple fiverr account with Payoneer. you just have to delink the fiverr account before link a new fiverr account with the same payoneer account
Just remove your Funding Sources from your Payoneer account also ask Fiverr to remove your linked payment method from the disabled account. After this you are able to link the old Payoneer account with the new Fiverr account.