diff --git a/files/helpers/cron.py b/files/helpers/cron.py
index 59f6a8c87..d2ac4df4a 100644
--- a/files/helpers/cron.py
+++ b/files/helpers/cron.py
@@ -118,6 +118,7 @@ def _sub_inactive_purge_task():
 
 	for x in to_delete:
 		g.db.delete(x)
+	g.db.flush() #Necessary, following deletion errors out otherwise
 
 	for x in dead_holes:
 		g.db.delete(x)
diff --git a/files/routes/login.py b/files/routes/login.py
index 270936904..4db9c7c01 100644
--- a/files/routes/login.py
+++ b/files/routes/login.py
@@ -321,6 +321,8 @@ def sign_up_post(v:Optional[User]):
 
 	g.db.add(new_user)
 
+	g.db.flush()
+
 	if ref_id:
 		ref_user = get_account(ref_id)
 
diff --git a/files/routes/routehelpers.py b/files/routes/routehelpers.py
index 00333f0ef..fb1bd4686 100644
--- a/files/routes/routehelpers.py
+++ b/files/routes/routehelpers.py
@@ -52,6 +52,7 @@ def add_alt(user1:int, user2:int):
 	if not existing:
 		new_alt = Alt(user1=user1, user2=user2)
 		g.db.add(new_alt)
+		g.db.flush()
 		cache.delete_memoized(get_alt_graph_ids, user1)
 		cache.delete_memoized(get_alt_graph_ids, user2)
 
@@ -79,7 +80,7 @@ def check_for_alts(current:User, include_current_session=False):
 	past_accs.add(current_id)
 	if include_current_session:
 		session["history"] = list(past_accs)
-
+	g.db.flush()
 	for u in get_alt_graph(current.id):
 		if u.shadowbanned and not current.shadowbanned:
 			current.shadowbanned = u.shadowbanned
diff --git a/files/routes/subs.py b/files/routes/subs.py
index 4635b9d83..c83130764 100644
--- a/files/routes/subs.py
+++ b/files/routes/subs.py
@@ -388,6 +388,7 @@ def create_sub2(v):
 
 	sub = Sub(name=name)
 	g.db.add(sub)
+	g.db.flush() #Necessary, following statement errors out otherwise
 	mod = Mod(user_id=v.id, sub=sub.name)
 	g.db.add(mod)