Interface Index changed - options?

I have added interface index persistence to our cisco routers now:

snmp-server ifindex persist

...but before this was done we added/replaced some interface cards to the router and the interface index/IDs changed. We now show 5 interfaces on the router when only 3 are used and actively sending netflow data.

How can I either:

1. Remove an interface from NetFlow and let it rediscover OR
2. Merge the data from an old old interface with the new one OR
3. Clear the data from the old interface so it doesn't show up as OR
4. Tell NetFlow Analyzer to ignore the extra 2 interfaces

We recently wiped out our config and historical data when we moved to a new data center so I'm not worried - at this point - about losing any data.

-h