Hi, We have a large deployment of about 600 NAS (mixed openwrt/mikrotik/others). I have noticed that for some records, incorrect acctstoptime was marked while user session was still going on and accounting was happening. So following is the flow - 1. Use login on hotspot, accounting starts2. After sometime (5-7 minutes), acctstoptime populates with a datetime value, while user is surfing3. user keep surfing and accounting keep happening.4. I have run radius in debug mode and captured log, NAS did not send any accounting stop packet.5. I have also observed around 26 records out of 110 current logged in users have same acctstoptime timestamp value and acctterminatecause value as either NULL or 0. Looks like a query is making incorrect updates. I am using FR 2x an can't update to 3 right now. Have observed following query in logs, which might be an issue - UPDATE radacct SET acctstoptime = '2016-12-08 12:13:26', acctsessiontime = unix_timestamp('2016-12-08 12:13:26') - unix_timestamp(acctstarttime), acctterminatecause = '', acctstopdelay = 0 WHERE acctstoptime IS NULL AND nasipaddress = '192.168.182.1' AND acctstarttime <= '2016-12-08 12:13:26' Or there may be some mis-configuration as our end. Kindly let me know.