avoid "close all windows" form

Hello guys,

I'm just working on an add-on where there is the need to create several user defined tables and user defined fields at the beginning.

During the creation, the B1-user gets the form "Database has been modified, close all windows" (no quote)

And if he presses "Yes" to close all windows this could cause errors in the add-on.

So my question is:

Is there any possibility to get this form only ones (right after I finished creating the tables)

Thanks in advance and

Best regards,

Mario