During the migration of ToolsDB to a new VM (T301949) I had to exclude the database s54518__mw from replication because MariaDB could not replicate some transactions. Given it's a small database, and it had similar replication issues in the past, I will try to move it to a dedicated Trove instance so we can debug these issues without affecting the rest of ToolsDB.
First I need to understand what data is contained in this db, and which tools are using it.
UPDATE: no need to migrate this db, as the tool is no longer maintained and can be deleted. See the comments below for more details.