Primary key in radacct table

[Santiago Balaguer García]

Hi,
 
   I am using a freeradius 1.1.7 + postgres since 3 years ago. The AAA service works fine, however my radacct table has sonetimes duplicate registers. 
I realize that it happens when a NAS does not have a realiable Internet conection, so NAS send the accounting packets several times.
 
  My radacct table has 'radacctid' as primary key. I realize that two (or more) duplicate registers share  'acctsessionid' and 'acctuniqueid' fields amog others.
I know  'acctsessionid' field can be the same in diferent NASes.
Would be a good idea change the primery key by 'acctuniqueid' ? 
 
     Santiago
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