Assigning Account Number to Fixed Asset

I am trying to add an account number and business unit to a new fixed asset. I am receiving an error message in the account number field that reads the following:

CAUSE: The Default Accounting Codes (P12002) are not set up for this company and asset cost account object and subsidiary, - or - the default Accumulated Depreciation, Depreciation Expense, and/or Revenue Account(s) are not valid account numbers in the Account Master file (F0901). These accounts are coming from the Default Accounting Codes (P12002). The Fixed Asset Constants may say to override the business unit for one or more of these accounts from the responsible business unit.