If the SQLite database was from an older version of Synapse, it appears that Synapse would try to run migrations on it first, before importing. This was failing, because the file wasn't writable. Hopefully, this fixes the problem.
If the SQLite database was from an older version of Synapse, it appears that Synapse would try to run migrations on it first, before importing. This was failing, because the file wasn't writable. Hopefully, this fixes the problem.