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-rw-r--r--lib/room.cpp3
1 files changed, 3 insertions, 0 deletions
diff --git a/lib/room.cpp b/lib/room.cpp
index ce7bae04..18dacbaa 100644
--- a/lib/room.cpp
+++ b/lib/room.cpp
@@ -600,6 +600,9 @@ void Room::markAllMessagesAsRead()
bool Room::canSwitchVersions() const
{
+ if (!successorId().isEmpty())
+ return false; // Noone can upgrade a room that's already upgraded
+
// TODO, #276: m.room.power_levels
const auto* plEvt =
d->currentState.value({"m.room.power_levels", ""});