Need help!

I maintained a dial-up ISP. I'm new to this company and I'm not the one who setup the server. With all 4 freeradius server, one has a problem. It has double logs in mysql. Meaning two different RadAcctId but with the same AcctSessionId. Is there anyone could help me distinguish why it has double record in mysql when in radius logs,it has one request only.

Here is the sample:

| RadAcctId | AcctSessionId | UserName |
| 517069 | 3C001FC0 | foo |
| 517071 | 3C001FC0 | foo |
| 517075 | 3C001FC0 | foo |

Server has 192MB memory and running in 300Mhz processor with kernel version 2.4.

I already upgrade to the latest freeradius version but still no luck. Anyone already experienced this kind of problem?

Don't know if this will help, but I used to work for an ISP, and the AcctSessionId was generated by the router(s) for each new cxn.
They would recycle them when the last user/cxn using that id disconnected.
They only have a limited num to use on each router, and each router operated independently, so we concatenated the router id to be able to tell them apart.
We used the Radiator Radius Sw.
Try sorting those by router id if poss, also by time.
We allowed multiple simultaneous sessions from a user, using the above combined id strings.