diff --git a/backend/src/gpml/db/topic.clj b/backend/src/gpml/db/topic.clj
index 78ecdc359..12e637fc4 100644
--- a/backend/src/gpml/db/topic.clj
+++ b/backend/src/gpml/db/topic.clj
@@ -156,10 +156,12 @@
                                    entity-name entity-name plastic-strategy-id))
         ps-bookmark-select (if-not plastic-strategy-id
                              ""
-                             (format "json_agg(DISTINCT jsonb_build_object('plastic_strategy_id', psb.plastic_strategy_id,
-									   '%s_id', psb.%s_id,
-									   'section_key', psb.section_key))
-				      FILTER (WHERE psb.plastic_strategy_id IS NOT NULL) AS plastic_strategy_bookmarks,"
+                             (format "COALESCE(json_agg(
+                                        DISTINCT jsonb_build_object(
+                                          'plastic_strategy_id', psb.plastic_strategy_id,
+                                          '%s_id', psb.%s_id,
+                                          'section_key', psb.section_key))
+                                      FILTER (WHERE psb.plastic_strategy_id IS NOT NULL), '[]'::json) AS plastic_strategy_bookmarks,"
                                      entity-name
                                      entity-name))
         ps-bookmark-group-by (if-not plastic-strategy-id