diff --git a/web/src/store/inventory.ts b/web/src/store/inventory.ts
index 32ddc5a397..325b00d3ce 100644
--- a/web/src/store/inventory.ts
+++ b/web/src/store/inventory.ts
@@ -46,8 +46,15 @@ export const inventorySlice = createSlice({
     ) => {
       state.contextMenu = action.payload;
     },
-    setAdditionalMetadata: (state, action: PayloadAction<Array<{metadata: string, value: string}>>) => {
-      state.additionalMetadata = [ ...state.additionalMetadata, ...action.payload ];
+    setAdditionalMetadata: (state, action: PayloadAction<Array<{ metadata: string; value: string }>>) => {
+      const metadata = [];
+
+      for (let i = 0; i < action.payload.length; i++) {
+        const entry = action.payload[i];
+        if (!state.additionalMetadata.find((el) => el.value === entry.value)) metadata.push(entry);
+      }
+
+      state.additionalMetadata = [...state.additionalMetadata, ...metadata];
     },
     setItemAmount: (state, action: PayloadAction<number>) => {
       state.itemAmount = action.payload;