diff --git a/apps/extension/src/routes/popup/settings/settings-clear-cache.tsx b/apps/extension/src/routes/popup/settings/settings-clear-cache.tsx
index 542220c8..eb4582dc 100644
--- a/apps/extension/src/routes/popup/settings/settings-clear-cache.tsx
+++ b/apps/extension/src/routes/popup/settings/settings-clear-cache.tsx
@@ -17,7 +17,7 @@ const useCacheClear = () => {
     setLoading(true);
 
     void (async function () {
-      await setFullSyncHeight(0);
+      await setFullSyncHeight(undefined);
       await chrome.runtime.sendMessage(ServicesMessage.ClearCache);
       navigate(PopupPath.INDEX);
     })();
diff --git a/apps/extension/src/state/network.ts b/apps/extension/src/state/network.ts
index 91d83c40..7eae85ec 100644
--- a/apps/extension/src/state/network.ts
+++ b/apps/extension/src/state/network.ts
@@ -8,7 +8,7 @@ export interface NetworkSlice {
   chainId?: string;
   setGRPCEndpoint: (endpoint: string) => Promise<void>;
   setChainId: (chainId: string) => void;
-  setFullSyncHeight: (value: number) => Promise<void>;
+  setFullSyncHeight: (value?: number) => Promise<void>;
 }
 
 export const createNetworkSlice =
diff --git a/apps/extension/src/state/persist.ts b/apps/extension/src/state/persist.ts
index 937edb6b..5461edc5 100644
--- a/apps/extension/src/state/persist.ts
+++ b/apps/extension/src/state/persist.ts
@@ -42,7 +42,7 @@ export const customPersistImpl: Persist = f => (set, get, store) => {
         state.connectedSites.knownSites = knownSites;
         state.defaultFrontend.url = frontendUrl;
         state.numeraires.selectedNumeraires = numeraires;
-        state.network.fullSyncHeight = fullSyncHeight ?? 0;
+        state.network.fullSyncHeight = fullSyncHeight;
       }),
     );