diff --git a/libs/wire-subsystems/src/Wire/ConversationStore/Cassandra.hs b/libs/wire-subsystems/src/Wire/ConversationStore/Cassandra.hs
index cab006f346..8a535b2aa4 100644
--- a/libs/wire-subsystems/src/Wire/ConversationStore/Cassandra.hs
+++ b/libs/wire-subsystems/src/Wire/ConversationStore/Cassandra.hs
@@ -1515,11 +1515,11 @@ filterUsersInPostgres uids = do
 groupIdToConvId :: (Member (Error MigrationError) r) => GroupId -> Sem r ConvId
 groupIdToConvId gid =
   case groupIdToConv gid of
-    Left _ -> throw InvalidGroupId
+    Left e -> throw $ InvalidGroupId gid e
     Right (_, gidParts) -> pure gidParts.qConvId.qUnqualified.conv
 
 data MigrationError
-  = InvalidGroupId
+  = InvalidGroupId GroupId String
   | FailedToAcquireMigrationLock MigrationLockError
   deriving (Show)