Users successfully migrated, but I got an error on Tickets:

Any hint about this?
Here are the logs:
zammad-docker-compose-zammad-scheduler-1 | E, [2023-10-26T14:56:11.543574#1-64780] ERROR -- : Validation failed: Invalid email '""@service.alibaba.com' (ActiveRecord::RecordInvalid)
zammad-docker-compose-zammad-scheduler-1 | E, [2023-10-26T14:57:51.658784#1-64780] ERROR -- : Validation failed: Invalid email '@' (ActiveRecord::RecordInvalid)
zammad-docker-compose-zammad-scheduler-1 | E, [2023-10-26T15:02:08.933472#1-64780] ERROR -- : Validation failed: Invalid email 'tomáš lancz@localhost' (ActiveRecord::RecordInvalid)
zammad-docker-compose-zammad-scheduler-1 | E, [2023-10-26T15:03:41.332037#1-64780] ERROR -- : Validation failed: Invalid email '@localhost' (ActiveRecord::RecordInvalid)
zammad-docker-compose-zammad-scheduler-1 | E, [2023-10-26T15:18:11.471768#1-48843000] ERROR -- : undefined method `body' for nil:NilClass
zammad-docker-compose-zammad-scheduler-1 | E, [2023-10-26T15:18:11.611350#1-48843020] ERROR -- : undefined method `body' for nil:NilClass
zammad-docker-compose-zammad-scheduler-1 | E, [2023-10-26T15:18:42.455501#1-64780] ERROR -- : No such file https://DOMAIN.kayako.com/media/url/LSvMBByMvF3BXMKIjjE3KCXKbGEFaWgp, 404!
zammad-docker-compose-zammad-scheduler-1 | E, [2023-10-26T15:29:18.228827#1-64780] ERROR -- : No such file https://DOMAIN.kayako.com/media/url/McBe1kKWEqXcNEzSQdNaRFWOA8odK6wt, 404!
zammad-docker-compose-zammad-scheduler-1 | E, [2023-10-26T15:52:13.951632#1-64780] ERROR -- : No such file https://DOMAIN.kayako.com/media/url/lHjArVK4Upudvxqjg0nwSFyGq0fHDQtW, 404!
zammad-docker-compose-zammad-scheduler-1 | E, [2023-10-26T15:52:14.587238#1-64780] ERROR -- : No such file https://DOMAIN.kayako.com/media/url/PwMRmvF3v0J0vU3hubXhzg4KCLlPLwjf, 404!
zammad-docker-compose-zammad-scheduler-1 | E, [2023-10-26T15:52:15.208901#1-64780] ERROR -- : No such file https://DOMAIN.kayako.com/media/url/mgnFUiiXWM49g19jPCu0JqWorL79xqAJ, 404!
zammad-docker-compose-zammad-scheduler-1 | E, [2023-10-26T15:52:15.829835#1-64780] ERROR -- : No such file https://DOMAIN.kayako.com/media/url/T1iPIQw8TllPUDbCxcqBm1scxLxLa5AJ, 404!
zammad-docker-compose-zammad-scheduler-1 | E, [2023-10-26T15:52:16.465623#1-64780] ERROR -- : No such file https://DOMAIN.kayako.com/media/url/YNYa6kVRQWvThg6csMXzqHHHrbHFzAkT, 404!
zammad-docker-compose-zammad-scheduler-1 | E, [2023-10-26T15:59:07.414259#1-50340060] ERROR -- : undefined method `body' for nil:NilClass
zammad-docker-compose-zammad-scheduler-1 | E, [2023-10-26T16:17:31.610314#1-64780] ERROR -- : No such file https://DOMAIN.kayako.com/media/url/Q9aQjpnfLjbQa4QN9SotC8LlEa1ZzhiY, 404!
zammad-docker-compose-zammad-scheduler-1 | E, [2023-10-26T16:17:32.982214#1-64780] ERROR -- : No such file https://DOMAIN.kayako.com/media/url/nPXLgsgc74bONCTspARyg9WlKHD3QRxg, 404!
zammad-docker-compose-zammad-scheduler-1 | E, [2023-10-26T16:17:35.040897#1-64780] ERROR -- : No such file https://DOMAIN.kayako.com/media/url/8y9hnvjfdPtartccVOnIpfOoMjeFIjR3, 404!
zammad-docker-compose-zammad-scheduler-1 | E, [2023-10-26T16:17:36.382218#1-64780] ERROR -- : No such file https://DOMAIN.kayako.com/media/url/x8RElxMqYaYjJ9MXaaUhchuFcgWZCZO3, 404!
zammad-docker-compose-zammad-scheduler-1 | E, [2023-10-26T16:17:39.285075#1-64780] ERROR -- : No such file https://DOMAIN.kayako.com/media/url/AoNkamIKmDPD6ITyjdUkpVuasg2LoDlW, 404!
zammad-docker-compose-zammad-scheduler-1 | E, [2023-10-26T16:17:40.762054#1-64780] ERROR -- : No such file https://DOMAIN.kayako.com/media/url/sYiyuUZAwsKRGtkdnnU6JRa7NegDsk4Y, 404!
zammad-docker-compose-zammad-scheduler-1 | E, [2023-10-26T16:17:42.212987#1-64780] ERROR -- : No such file https://DOMAIN.kayako.com/media/url/2JWe53y0h0SNfus0kDzzeawH6p6wvwnv, 404!
zammad-docker-compose-zammad-scheduler-1 | E, [2023-10-26T16:18:03.301381#1-64780] ERROR -- : No such file https://DOMAIN.kayako.com/media/url/5OthkiJt753cLaT63vsn7ZWzdvIq4vE3, 404!
zammad-docker-compose-zammad-scheduler-1 | E, [2023-10-26T16:49:12.389993#1-64780] ERROR -- : No such file https://DOMAIN.kayako.com/media/url/GK8p96PvvOsv0If6R7F9uPX8FCrPxoZQ, 404!
zammad-docker-compose-zammad-scheduler-1 | E, [2023-10-26T16:49:13.200750#1-64780] ERROR -- : No such file https://DOMAIN.kayako.com/media/url/bda3pao8X5F6OYVsEag1MDEvsiwUk5b7, 404!
zammad-docker-compose-zammad-scheduler-1 | E, [2023-10-26T16:49:13.903161#1-64780] ERROR -- : No such file https://DOMAIN.kayako.com/media/url/aXlDPzjlUMLzJ1N44UMI9VwOUs9lbmIM, 404!
zammad-docker-compose-zammad-scheduler-1 | E, [2023-10-26T16:49:14.604351#1-64780] ERROR -- : No such file https://DOMAIN.kayako.com/media/url/4lRQwdc8L32dMZHgY8KAbLuI5eMJhkw8, 404!
zammad-docker-compose-zammad-scheduler-1 | E, [2023-10-26T16:49:15.289168#1-64780] ERROR -- : No such file https://DOMAIN.kayako.com/media/url/suhFVWj6LYBQiXxK4Pf1HS0Jni7OkirR, 404!
zammad-docker-compose-zammad-scheduler-1 | E, [2023-10-26T16:49:15.959566#1-64780] ERROR -- : No such file https://DOMAIN.kayako.com/media/url/P0LTK8azdmiIwQJ6Yrj2ji7uvkX3LEjm, 404!
zammad-docker-compose-zammad-scheduler-1 | E, [2023-10-26T16:49:16.648615#1-64780] ERROR -- : No such file https://DOMAIN.kayako.com/media/url/obHunoMpvJUBXlrUfBgSa38NzoJoT4df, 404!
zammad-docker-compose-zammad-scheduler-1 | E, [2023-10-26T16:49:17.354135#1-64780] ERROR -- : No such file https://DOMAIN.kayako.com/media/url/d1Iedg7abaJh7s7P1XTM2VCr6GHBLtUI, 404!
zammad-docker-compose-zammad-scheduler-1 | E, [2023-10-26T16:49:24.873586#1-64780] ERROR -- : No such file https://DOMAIN.kayako.com/media/url/gUV8Z9nAQbT4j3vwNC9KtJHJFsQe8vLG, 404!
zammad-docker-compose-zammad-scheduler-1 | E, [2023-10-26T16:51:07.527604#1-64780] ERROR -- : ImportJob 'Import::Kayako' failed: undefined method `[]' for nil:NilClass
zammad-docker-compose-zammad-scheduler-1 | E, [2023-10-26T16:51:07.527638#1-64780] ERROR -- : undefined method `[]' for nil:NilClass
zammad-docker-compose-zammad-scheduler-1 | I, [2023-10-26T16:51:07.554381#1-64780] INFO -- : 2023-10-26T16:51:07+0000: [Worker(host:8fd2c9e8646f pid:1)] Job AsyncImportJob [72c38c16-3599-4e36-b85c-4ef68ba971e0] from DelayedJob(default) with arguments: [{"_aj_globalid"=>"gid://zammad/ImportJob/1"}] (id=15) (queue=default) COMPLETED after 13062.5950
zammad-docker-compose-zammad-scheduler-1 | I, [2023-10-26T16:51:07.600456#1-64780] INFO -- : 2023-10-26T16:51:07+0000: [Worker(host:8fd2c9e8646f pid:1)] Job SearchIndexJob [e77a5042-e701-44d5-85cd-73224f67761f] from DelayedJob(default) with arguments: ["Group", 2] (id=16) (queue=default) RUNNING
zammad-docker-compose-zammad-scheduler-1 | W, [2023-10-26T16:51:07.612405#1-64780] WARN -- : Setting "timezone_default" is empty. Using UTC instead. Please set system timezone.
zammad-docker-compose-zammad-scheduler-1 | I, [2023-10-26T16:51:07.794413#1-64780] INFO -- : 2023-10-26T16:51:07+0000: [Worker(host:8fd2c9e8646f pid:1)] Job SearchIndexJob [e77a5042-e701-44d5-85cd-73224f67761f] from DelayedJob(default) with arguments: ["Group", 2] (id=16) (queue=default) COMPLETED after 0.1939
zammad-docker-compose-zammad-scheduler-1 | I, [2023-10-26T16:51:07.806666#1-64780] INFO -- : 2023-10-26T16:51:07+0000: [Worker(host:8fd2c9e8646f pid:1)] Job SearchIndexAssociationsJob [a4288a25-1152-4ad9-9608-731a317b4da2] from DelayedJob(default) with arguments: ["Group", 2] (id=17) (queue=default) RUNNING
zammad-docker-compose-zammad-scheduler-1 | W, [2023-10-26T16:51:07.818792#1-64780] WARN -- : Setting "timezone_default" is empty. Using UTC instead. Please set system timezone.
zammad-docker-compose-zammad-scheduler-1 | I, [2023-10-26T16:51:07.927437#1-64780] INFO -- : 2023-10-26T16:51:07+0000: [Worker(host:8fd2c9e8646f pid:1)] Job SearchIndexAssociationsJob [a4288a25-1152-4ad9-9608-731a317b4da2] from DelayedJob(default) with arguments: ["Group", 2] (id=17) (queue=default) COMPLETED after 0.1207
zammad-docker-compose-zammad-scheduler-1 | I, [2023-10-26T16:51:07.941041#1-64780] INFO -- : 2023-10-26T16:51:07+0000: [Worker(host:8fd2c9e8646f pid:1)] Job SearchIndexJob [58788152-b8df-4294-bf97-02456f7459d8] from DelayedJob(default) with arguments: ["Group", 3] (id=18) (queue=default) RUNNING
zammad-docker-compose-zammad-scheduler-1 | W, [2023-10-26T16:51:07.952847#1-64780] WARN -- : Setting "timezone_default" is empty. Using UTC instead. Please set system timezone.