- fixed error with generator function

group_vars/matrix_servers

@@ -1422,11 +1422,11 @@ matrix_postgres_backup_connection_password: "{{ matrix_postgres_connection_passw
 # the default matrix synapse databse is not always part of the matrix_postgres_additional_databases variable thus we have to add it if the default database is used
 matrix_postgres_backup_databases: |
   {{
-    ([
-        matrix_synapse_database_database,
-    ] if (matrix_synapse_enabled and matrix_synapse_database_database == matrix_postgres_db_name and matrix_synapse_database_host == 'matrix-postgres') else [])
+    (([{
+        'name': matrix_synapse_database_database
+    }] if (matrix_synapse_enabled and matrix_synapse_database_database == matrix_postgres_db_name and matrix_synapse_database_host == 'matrix-postgres') else [])
     +
-    matrix_postgres_additional_databases|map(attribute='name')
+    matrix_postgres_additional_databases)|map(attribute='name')|list
   }}
 
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