Why do Asset pages use GL Default Ledger Group instead of AM Ledger Group open periods?

We generate Asset Management entries to a separate ledger than the GL Default ledger. However, when trying to add assets in a period closed for GL Default ledger but open for the AM ledger, the following error message is received: "The Accounting Date has been updated by the system. The system determined that the accounting date needs to be corrected. Since the entered date is not open in GL, the date is moved to the first date of GL open period. Do you want to continue?