Realigning navigational attributes

Dear all

I need to realign a navigational attribute (from one sales manager to another) for my customer characteristic. I will do so in accordance with [sap help|http://help.sap.com/saphelp_scm50/helpdata/en/53/963f58d62c4537af344b10b54c2056/frameset.htm].

My question is now the following: What happens if the master data in R/3 are not changed accordingly, and new sales data is loaded into APO during the night containing the old sales manager no. instead of the "new"? Will there be sales data for this customer from 2 seperate sales managers then?

Best regards,

Anders Thinggaard