diff --git a/Justfile b/Justfile
index 2aaf2e3db..d516d0b43 100644
--- a/Justfile
+++ b/Justfile
@@ -7,10 +7,13 @@ mod docs
 interactive:
 	-@just --choose
 
+install:
+	pnpm install
+
 # Run the frontend and backend for Tachi.
 #
 # This is the main command you want to use to start up tachi. Go for it!
-start:
+start: install
 	parallel --lb ::: 'FORCE_COLOR=1 just server start' 'FORCE_COLOR=1 just client start'
 
 # test everything
diff --git a/server/src/lib/migration/migrations.ts b/server/src/lib/migration/migrations.ts
index f2b8e572b..b3b12d1c4 100644
--- a/server/src/lib/migration/migrations.ts
+++ b/server/src/lib/migration/migrations.ts
@@ -9,6 +9,7 @@ import KtRatingToCuratorSkill from "./migrations/ktRating-to-curator-skill";
 import MarkFervidexAsWithoutIntent from "./migrations/mark-fervidex-as-without-intent";
 import MarkKsHookAsWithoutIntent from "./migrations/mark-kshook-as-without-intent";
 import NullLR2HookFailedBPs from "./migrations/null-lr2hook-failed-bps";
+import RemoveAbove100pc from "./migrations/remove-above-100pc";
 import RemoveIIDXBeginners from "./migrations/remove-iidx-beginners";
 import RemoveIIDX2dxtraBeginners from "./migrations/remove-iidx-extra-beginners";
 import RemoveMultifolderStats from "./migrations/remove-multifolder-stats";
@@ -74,7 +75,12 @@ if (Environment.nodeEnv !== "test") {
 
 	// bokutachi specific migrations
 	if (TachiConfig.TYPE !== "kamai") {
-		REGISTERED_MIGRATIONS.push(NullLR2HookFailedBPs, FixUndefinedBMSData, RemoveRandom);
+		REGISTERED_MIGRATIONS.push(
+			NullLR2HookFailedBPs,
+			FixUndefinedBMSData,
+			RemoveRandom,
+			RemoveAbove100pc
+		);
 	}
 }
 
diff --git a/server/src/lib/migration/migrations/remove-above-100pc.ts b/server/src/lib/migration/migrations/remove-above-100pc.ts
new file mode 100644
index 000000000..a0a0c7654
--- /dev/null
+++ b/server/src/lib/migration/migrations/remove-above-100pc.ts
@@ -0,0 +1,20 @@
+import db from "external/mongo/db";
+import { DeleteMultipleScores } from "lib/score-mutation/delete-scores";
+import type { Migration } from "utils/types";
+
+const migration: Migration = {
+	id: "remove-above-100pc",
+	up: async () => {
+		const toDelete = await db.scores.find({
+			game: "bms",
+			"scoreData.percent": { $gt: 100.0 },
+		});
+
+		await DeleteMultipleScores(toDelete);
+	},
+	down: () => {
+		throw new Error(`Reverting this change is not possible.`);
+	},
+};
+
+export default migration;