diff --git a/src/app/admin/import/audit/audit-client.tsx b/src/app/admin/import/audit/audit-client.tsx
index cc3e6f92d0..ae2817dcf6 100644
--- a/src/app/admin/import/audit/audit-client.tsx
+++ b/src/app/admin/import/audit/audit-client.tsx
@@ -86,7 +86,11 @@ interface AuditEvent {
 	sqlCount?: number;
 	applied?: number;
 	sqlFailed?: number;
-	furniData?: { added: number; removedDuplicates: number };
+	furniData?: {
+		added: number;
+		removedDuplicates: number;
+		removedIdConflicts: number;
+	};
 	structure?: {
 		orphanedRemoved: number;
 		orphanedCleaned: number;
@@ -175,6 +179,7 @@ export function AuditClient() {
 	const [furniDataResult, setFurniDataResult] = useState<{
 		added: number;
 		removedDuplicates: number;
+		removedIdConflicts: number;
 	} | null>(null);
 	const [structureResult, setStructureResult] = useState<{
 		orphanedRemoved: number;
@@ -675,6 +680,15 @@ export function AuditClient() {
 											</span>
 										</>
 									)}
+									{furniDataResult.removedIdConflicts > 0 && (
+										<>
+											{" · "}
+											<span className="text-[var(--admin-warning)] font-medium">
+												{furniDataResult.removedIdConflicts} spriteId conflicts
+												fixed
+											</span>
+										</>
+									)}
 								</span>
 							</div>
 						)}
diff --git a/src/lib/services/catalog-audit.ts b/src/lib/services/catalog-audit.ts
index d3bfd7dc91..18b3ed13b5 100644
--- a/src/lib/services/catalog-audit.ts
+++ b/src/lib/services/catalog-audit.ts
@@ -56,7 +56,11 @@ export interface AuditEvent {
 	sqlCount?: number;
 	applied?: number;
 	sqlFailed?: number;
-	furniData?: { added: number; removedDuplicates: number };
+	furniData?: {
+		added: number;
+		removedDuplicates: number;
+		removedIdConflicts: number;
+	};
 	structure?: {
 		orphanedRemoved: number;
 		orphanedCleaned: number;
@@ -715,6 +719,7 @@ export async function runCatalogAudit(
 				furniData: {
 					added: result.added,
 					removedDuplicates: result.removedDuplicates,
+					removedIdConflicts: result.removedIdConflicts,
 				},
 			});
 		} catch (err) {
diff --git a/src/lib/services/catalog-repair.ts b/src/lib/services/catalog-repair.ts
index 832f70171d..20c74d34a4 100644
--- a/src/lib/services/catalog-repair.ts
+++ b/src/lib/services/catalog-repair.ts
@@ -620,6 +620,7 @@ export async function repairDuplicateClassnames(): Promise<DuplicateClassnameRes
 export interface FurniDataRepairResult {
 	added: number;
 	removedDuplicates: number;
+	removedIdConflicts: number;
 }
 
 function buildMinimalFurniEntry(item: {
@@ -658,7 +659,8 @@ function buildMinimalFurniEntry(item: {
 
 /**
  * Add FurnitureData.json entries for items_base rows that are missing from the
- * file, and remove duplicate classnames (keeping the first occurrence).
+ * file, remove duplicate classnames, and resolve spriteId conflicts
+ * (keeping the first classname per id, removing conflicting ones).
  */
 export async function repairFurniData(
 	items: Array<{
@@ -668,7 +670,8 @@ export async function repairFurniData(
 		type: string;
 	}>,
 ): Promise<FurniDataRepairResult> {
-	if (items.length === 0) return { added: 0, removedDuplicates: 0 };
+	if (items.length === 0)
+		return { added: 0, removedDuplicates: 0, removedIdConflicts: 0 };
 
 	return withFurniDataLock(async () => {
 		const furniData = (await readFurniData()) as Record<
@@ -697,7 +700,33 @@ export async function repairFurniData(
 			}
 		}
 
-		// 2) Add entries for items_base rows missing from the file.
+		// 2) Resolve spriteId conflicts (same id used by different classnames) — keep first, remove others.
+		let removedIdConflicts = 0;
+		for (const section of ["roomitemtypes", "wallitemtypes"] as const) {
+			const sec = furniData[section];
+			if (!sec?.furnitype) continue;
+			const idToClassname = new Map<number, string>();
+			const deduped = sec.furnitype.filter((e) => {
+				const id = Number(e?.id);
+				const classname = typeof e.classname === "string" ? e.classname : "";
+				if (!Number.isFinite(id) || id <= 0 || !classname) return true;
+				const existing = idToClassname.get(id);
+				if (existing && existing !== classname) {
+					// Conflict: same id used by different classname — keep first, remove this
+					removedIdConflicts++;
+					return false;
+				}
+				if (!existing) {
+					idToClassname.set(id, classname);
+				}
+				return true;
+			});
+			if (deduped.length !== sec.furnitype.length) {
+				furniData[section].furnitype = deduped;
+			}
+		}
+
+		// 3) Add entries for items_base rows missing from the file.
 		const existing = new Set<string>();
 		for (const section of ["roomitemtypes", "wallitemtypes"] as const) {
 			for (const e of furniData[section]?.furnitype ?? []) {
@@ -714,8 +743,8 @@ export async function repairFurniData(
 			});
 		}
 
-		// 3) Write once if anything changed.
-		if (removedDuplicates > 0 || added.length > 0) {
+		// 4) Write once if anything changed.
+		if (removedDuplicates > 0 || removedIdConflicts > 0 || added.length > 0) {
 			for (const { entry, itemType } of added) {
 				const sectionKey = itemType === "i" ? "wallitemtypes" : "roomitemtypes";
 				if (!furniData[sectionKey]) {
@@ -725,6 +754,6 @@ export async function repairFurniData(
 			}
 			await writeFurniData(furniData as Record<string, unknown>);
 		}
-		return { added: added.length, removedDuplicates };
+		return { added: added.length, removedDuplicates, removedIdConflicts };
 	});
 }