diff --git a/nise-backend/src/main/kotlin/com/nisemoe/nise/database/ScoreService.kt b/nise-backend/src/main/kotlin/com/nisemoe/nise/database/ScoreService.kt
index 3ea2b3e..ff774e5 100644
--- a/nise-backend/src/main/kotlin/com/nisemoe/nise/database/ScoreService.kt
+++ b/nise-backend/src/main/kotlin/com/nisemoe/nise/database/ScoreService.kt
@@ -53,6 +53,10 @@ class ScoreService(
         val replay1 = getReplayViewerData(replay1Id) ?: return null
         val replay2 = getReplayViewerData(replay2Id) ?: return null
 
+        if(replay1.beatmap != replay2.beatmap) {
+            return null
+        }
+
         return ReplayPairViewerData(
             beatmap = replay1.beatmap,
             replay1 = replay1.replay,