diff --git a/core/src/allocation_init.jl b/core/src/allocation_init.jl
index 2d406b439..9bf3ddb30 100644
--- a/core/src/allocation_init.jl
+++ b/core/src/allocation_init.jl
@@ -7,8 +7,7 @@ function find_subnetwork_connections!(p::Parameters)::Nothing
     # destination node subnetwork id ≠1
     for node_id in graph[].node_ids[1]
         for outflow_id in outflow_ids(graph, node_id)
-            if (graph[outflow_id].subnetwork_id != 1) ||
-               (graph[node_id, outflow_id].subnetwork_id_source == 1)
+            if (graph[outflow_id].subnetwork_id != 1)
                 main_network_source_edges =
                     get_main_network_connections(p, graph[outflow_id].subnetwork_id)
                 edge = (node_id, outflow_id)