Make e2e backup versions numeric in the DB

We were doing max(version) which does not do what we wanted
on a column of type TEXT.

1 files changed, 1 insertions, 1 deletions

diff --git a/synapse/storage/prepare_database.py b/synapse/storage/prepare_database.py

index b364719312..bd740e1e45 100644
--- a/synapse/storage/prepare_database.py
+++ b/synapse/storage/prepare_database.py
@@ -25,7 +25,7 @@ logger = logging.getLogger(__name__)
 
 # Remember to update this number every time a change is made to database
 # schema files, so the users will be informed on server restarts.
-SCHEMA_VERSION = 51
+SCHEMA_VERSION = 52
 
 dir_path = os.path.abspath(os.path.dirname(__file__))