how to remove a payee from an investment transaction

[Jack]

I have a dividend transaction which was separately imported into both  
the investment and brokerage accounts, and then matched and accepted in  
both.  I now see that (probably when imported to the brokerage account)  
it was assigned the payee which frequently gets used as a default.  I  
can see it in the transaction details, in the split for the brokerage  
account, but cannot see it in the ledger for either the investment  
account, the brokerage account, or the category.  Is there any way to  
remove it short of manually editing the xml file directly?