Disable address details in ME21N/ME22N

Dear gurus,

in ME21N/ME22N on tab delivery address I can maintain an address no. in field Address to “load” a master data address from ADRC. But after that I can still klick on Address details and change the previously loaded address so that a new address is created in ADRC when the PO is saved.

Now we are looking for a way to deactivate the button Address details when an address number is maintained in field address, so that the user cannot change a loaded address.

Any ideas how to do this?

Cheers

Alicia