Slack import: mmctl CLI causes instance abortion

Yes, that’s exactly what I did, sorry, maybe I wasn’t very clear in my response above, but reconverting the export with lower case name fixed it.

I use the utf8mb4_general_ci collation in a MariaDB database. I have noted however that some individual tables were set to utf8mb4_unicode_ci, which resulted in some warning entries in the server log that stated that there was a collation mismatch. After setting all tables to utf8mb4_general_ci these warning disappeared.