How to restore backed-up graphs

[ar1]

I had to delete the graphs for a device from cacti and then add them again. I have the old rra files and now want to use them again. The problem is taht the old ones were named from cat6500_traffic_in_1.rrd to cat5600_traffic_in_180.rrd but the rra files generated after adding the graphs again are named cat6500_traffic_in_181.rrd to cat6500_traffic_in_360.rrd

I cleared the poller cache and log files, it doesn't help. In fact if I delete and add again, the graphs are numbered even further, i.e. from cat6500_traffic_in_361.rrd and so on.

Must there not be a file where I can clear information so it goes back to cat6500_traffic_in_1.rrd ??

NOTE: I did delete the data sourcecs along with the graphs

Thanks