# Pastebin 1EjDPWrK
2021-07-26 10:21:02.798 [error] <0.6597.1364> Channel error on connection <0.5704.1364> (172.17.0.1:31736 -> 172.17.0.15:5672, vhost: '/search-index-rebuilder', user: 'sir'), channel 1:
operation basic.ack caused a channel exception precondition_failed: unknown delivery tag 1