diff --git a/lib/OnyxUtils.ts b/lib/OnyxUtils.ts
index 4dc1ba2ce..6cbd61d7d 100644
--- a/lib/OnyxUtils.ts
+++ b/lib/OnyxUtils.ts
@@ -1211,6 +1211,11 @@ function updateSnapshots<TKey extends OnyxKey>(data: Array<OnyxUpdate<TKey>>, me
         let updatedData: Record<string, unknown> = {};
 
         for (const {key, value} of data) {
+            if (typeof key !== 'string') {
+                Logger.logInfo(`Invalid ${typeof key} key provided in Onyx update. Key must be of type string. Skipping snapshot update for this entry.`);
+                continue;
+            }
+
             // snapshots are normal keys so we want to skip update if they are written to Onyx
             if (OnyxKeys.isCollectionMemberKey(snapshotCollectionKey, key)) {
                 continue;
diff --git a/tests/unit/onyxTest.ts b/tests/unit/onyxTest.ts
index 0021fcd8e..a606e6a83 100644
--- a/tests/unit/onyxTest.ts
+++ b/tests/unit/onyxTest.ts
@@ -1535,6 +1535,33 @@ describe('Onyx', () => {
         expect(callback.mock.calls[1][1]).toBe(ONYX_KEYS.COLLECTION.SNAPSHOT);
     });
 
+    it('should skip update entries without a key when updating Snapshots instead of rejecting', async () => {
+        const cat = `${ONYX_KEYS.COLLECTION.ANIMALS}cat`;
+        const snapshot1 = `${ONYX_KEYS.COLLECTION.SNAPSHOT}1`;
+
+        const initialValue = {name: 'Fluffy'};
+        const finalValue = {name: 'Kitty'};
+
+        await Onyx.set(cat, initialValue);
+        await Onyx.set(snapshot1, {data: {[cat]: initialValue}});
+
+        const callback = jest.fn();
+
+        Onyx.connect({
+            key: ONYX_KEYS.COLLECTION.SNAPSHOT,
+            callback,
+        });
+
+        await waitForPromisesToResolve();
+
+        const keylessUpdate = {onyxMethod: Onyx.METHOD.MERGE, value: {name: 'Ghost'}} as unknown as OnyxUpdate<OnyxKey>;
+
+        await expect(Onyx.update([keylessUpdate, {key: cat, value: finalValue, onyxMethod: Onyx.METHOD.MERGE}])).resolves.not.toThrow();
+
+        // The valid update still lands in the snapshot.
+        expect(callback.mock.calls.at(-1)?.[0]).toEqual({[snapshot1]: {data: {[cat]: finalValue}}});
+    });
+
     describe('update', () => {
         let logInfoFn = jest.fn();