------------ your database table prefix is too long.
Flarum (or more specifically, the Laravel schema builder) automatically generates index names based on table name + column name, so the longer your table prefix is, the more likely errors like this will occur. This is not specific to this extension, this extension just happens to have long table and column names already which bring index names closer to the limit.
You will likely need to rollback the migrations before trying again ("Uninstall" on extension page after disabling) to attempt the migration again. Or restore from backup before trying again.
If you want to keep your table prefix unchanged, you will have to manually fix/apply the migrations to the database and then mark the migration as applied.
I recommend not using a table prefix longer than 4 characters. Best solution is to use a dedicated database and no prefix.
The length of the database name doesn't matter, only the table prefix.
