Accounting debugging error

[lingctam]

Dear Colleagues,

I have been unable to resolve the following error in debug mode:

Invalid packet code 1 sent to a accounting port from client localhost port 21474 : IGNORED
Ready to process requests

The only answer I have found online suggests a port conflict but no other port other than 1813 would respond to accounting requests. Note: accounting point is set to 0 in sites-enabled/default

Thank you for any help.