Previous transaction not properly finished
In the log:
May 09 08:38:24 radia.bortzmeyer.org postgres[3191503]: 2021-05-09 06:38:24.728 UTC [3191503] WARNING: there is already a transaction in progress
May 09 08:38:25 radia.bortzmeyer.org postgres[3191503]: 2021-05-09 06:38:25.092 UTC [3191503] WARNING: there is already a transaction in progress
May 09 08:38:25 radia.bortzmeyer.org postgres[3191503]: 2021-05-09 06:38:25.451 UTC [3191503] WARNING: there is already a transaction in progress
May 09 08:38:25 radia.bortzmeyer.org postgres[3191503]: 2021-05-09 06:38:25.798 UTC [3191503] WARNING: there is already a transaction in progress
May 09 08:38:26 radia.bortzmeyer.org postgres[3191503]: 2021-05-09 06:38:26.182 UTC [3191503] WARNING: there is already a transaction in progress
No obvious bug, we will need to increase PostgreSQL verbosity to find the culprit. (It is apparently when the crawler runs)