diff --git a/server/src/lib/score-import/framework/calculated-data/calculated-data.ts b/server/src/lib/score-import/framework/calculated-data/calculated-data.ts
index 32f13df09..72c66c146 100644
--- a/server/src/lib/score-import/framework/calculated-data/calculated-data.ts
+++ b/server/src/lib/score-import/framework/calculated-data/calculated-data.ts
@@ -230,8 +230,9 @@ async function CalculateDataMaimai(
 	chart: ChartDocument,
 	logger: KtLogger
 ): Promise<CalculatedData<"maimai:Single">> {
+	// @todo #373 Add maimai rating algorithms.
 	return {
-		ktRating: await CalculateKTRating(dryScore, "maimai", "Single", chart, logger),
+		ktRating: 0,
 	};
 }
 
diff --git a/server/src/lib/score-import/framework/sessions/calculated-data.ts b/server/src/lib/score-import/framework/sessions/calculated-data.ts
index 1b5e481fa..480652c81 100644
--- a/server/src/lib/score-import/framework/sessions/calculated-data.ts
+++ b/server/src/lib/score-import/framework/sessions/calculated-data.ts
@@ -78,9 +78,7 @@ const CalculatedDataFunctions: CalculatedDataFunctions = {
 		}),
 	},
 	maimai: {
-		Single: (scd) => ({
-			ktRating: AvgBest10Map(scd, "ktRating"),
-		}),
+		Single: (scd) => ({}),
 	},
 	gitadora: {
 		Gita: (scd) => ({
diff --git a/server/src/lib/score-import/import-types/ir/beatoraja/converter.ts b/server/src/lib/score-import/import-types/ir/beatoraja/converter.ts
index ef1f0495a..36acf1dad 100644
--- a/server/src/lib/score-import/import-types/ir/beatoraja/converter.ts
+++ b/server/src/lib/score-import/import-types/ir/beatoraja/converter.ts
@@ -185,7 +185,6 @@ function ConvertBeatorajaChartToTachi(chart: BeatorajaChart) {
 	const songDoc: SongDocument<"bms"> = {
 		artist: chart.artist,
 		title: chart.title,
-		firstVersion: "",
 		id: 0,
 		altTitles: [],
 		searchTerms: [],
diff --git a/server/src/lib/score-import/import-types/ir/fervidex/converter.ts b/server/src/lib/score-import/import-types/ir/fervidex/converter.ts
index 7c7c9d8b5..59a7f5aef 100644
--- a/server/src/lib/score-import/import-types/ir/fervidex/converter.ts
+++ b/server/src/lib/score-import/import-types/ir/fervidex/converter.ts
@@ -48,7 +48,7 @@ export function TachifyGauge(
 		case "EASY":
 			return "EASY";
 		case "EX_HARD":
-			return "EX HARD";
+			return "EX-HARD";
 		case "HARD":
 			return "HARD";
 		case null:
diff --git a/server/src/server/router/ir/usc/usc.ts b/server/src/server/router/ir/usc/usc.ts
index a5294d0ca..2d0bc8729 100644
--- a/server/src/server/router/ir/usc/usc.ts
+++ b/server/src/server/router/ir/usc/usc.ts
@@ -223,7 +223,6 @@ export function ConvertUSCChart(uscChartDoc: USCClientChart) {
 	const song: SongDocument<"usc"> = {
 		title: uscChartDoc.title,
 		artist: uscChartDoc.artist,
-		firstVersion: null,
 		id: 0,
 		data: {},
 		altTitles: [],