Removing old, imported transactions from "Best Matches" and "Possible Matches" list

Removing old, imported transactions from "Best Matches" and "Possible Matches" list

This year I migrated to Zoho Books from another accounting system.  I imported all of my data from the old system.  Now when a new transaction comes it the list of possible matches is very long and goes back though years and years of transactions.  All of the imported transactions have the "Manually Added" status.  Is there a way that I can remove these old transactions from the "Best Matches" and "Possible Matches" list without having to import years of bank statements and manually match thousands of transactions to the old statements?