diff --git a/lib/db/sqlite/firo_cache_writer.dart b/lib/db/sqlite/firo_cache_writer.dart
index 09383601e..c3a8d58d1 100644
--- a/lib/db/sqlite/firo_cache_writer.dart
+++ b/lib/db/sqlite/firo_cache_writer.dart
@@ -17,7 +17,7 @@ FCResult _updateSparkUsedTagsWith(Database db, List<List<dynamic>> tags) {
   // hash the tags here since this function is called in a background isolate
   final hashedTags =
       LibSpark.hashTags(
-        base64Tags: tags.map((e) => e[0] as String).toList(),
+        base64Tags: tags.map((e) => e[0] as String).toSet(),
       ).toList();
   if (hashedTags.isEmpty) {
     // nothing to add, return early