diff --git a/src/openeo_aggregator/partitionedjobs/crossbackend.py b/src/openeo_aggregator/partitionedjobs/crossbackend.py
index 652d903..4689994 100644
--- a/src/openeo_aggregator/partitionedjobs/crossbackend.py
+++ b/src/openeo_aggregator/partitionedjobs/crossbackend.py
@@ -505,8 +505,8 @@ class _GraphViewer:
     # TODO: add more logging of what is happening under the hood
 
     def __init__(self, node_map: dict[NodeId, _GVNode]):
-        # Work with a read-only proxy to prevent accidental changes
         self._check_consistency(node_map=node_map)
+        # Work with a read-only proxy to prevent accidental changes
         self._graph: Mapping[NodeId, _GVNode] = types.MappingProxyType(node_map)
 
     @staticmethod