Hello Good Morning!!!
I will really appreciate your help on this matter
I went to customizing > Sales and Distribution > Sales > Sales Documents > Sales Document Header > Assign Sales Area To Sales Document Types > "Assign sales order types permitted for sales areas" in order to assign a new sales order type to an specific sales area, then I went to Combine divisions option, and fill the Reference division for document types (by sales area) (I only did it for the sales area I needed because it was blank)
I went to transaction se10 to see my request, and then I saw, that some sales area from the table TVTA were deleted!!! (I even tried to make a sales document with another sales area and got the error message "Sales area YYYY / RR / WW doesn't exists", those are sales area that I didn't change at all!! And I am wondering what could have caused this, and if there is some way to make the change I need without making any damage to the others sales area
Regards!