error log radius.log

[Arnaud .]

Hello,

Looking at the file radius.log I still have the same error comes up: 

Error: rlm_radutmp: Logout for NAS localhost 5 port, but no Login record 
Error: rlm_radutmp: Logout for NAS localhost port 3, but no Login record 
Error: rlm_radutmp: Logout for NAS localhost Port 4, but no Login record 
.... 

Can you tell me what it is and what should be done to avoid this error? 

Best regards. 		 	   		  
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