Problems on closing and editing messages - Solman 7.1

Hello Sap Solution experts,

I have a requirement concerning the status of messages, together with the possibility to modify the documents. The issue is:

Firstly I must be able to close the message (i.e. Status: Close). The problem is when I put Allowed or Warning, I can close the message, but I am still able to modify the message after the message has been closed.

My requirement is to be able to close the message and not to be able to modify it once it is closed.

The screenshot below is the place where the actions are done:

Thanks for your help.

Regards,

Yovish.