Comment 8 for bug 1190986

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Raphaƫl Badin (rvb) wrote : Re: ERROR Nonce already used

If you're using a earlier version of MAAS that doesn't contain the fix yet, it's easy to reproduce the fix:
Save the script from http://paste.ubuntu.com/6762313/ into nonces_cleanup.py and then run it using cron, every 5 minutes:
cat nonces_cleanup.py | sudo maas shell

Note that the cleanup will not happen the first time you run the script, only the second time (and all the other times after that); Read the script if you want to know why ;).