Recently, a security I've had for several years (with dozens of transactions) has changed its CUSIP number. The ticker remains the same for both, but the name & CUSIP are different.
I now have two separate securities listed in FM, the new CUSIP shows a single, recent dividend transaction with no basis, etc., listed. The old CUSIP shows all previous transactions including purchase dates, distributions, etc.
What's the easiest way to move/merge all historic transactions, basis, etc., to the new CUSIP security and delete the old CUSIP security?