diff --git a/packages/nodes-base/nodes/Google/Sheet/v2/helpers/GoogleSheet.ts b/packages/nodes-base/nodes/Google/Sheet/v2/helpers/GoogleSheet.ts
index 3f7ea99e65..0ad8667a47 100644
--- a/packages/nodes-base/nodes/Google/Sheet/v2/helpers/GoogleSheet.ts
+++ b/packages/nodes-base/nodes/Google/Sheet/v2/helpers/GoogleSheet.ts
@@ -465,15 +465,27 @@ export class GoogleSheet {
 			);
 		}
 
-		const columnValues =
+		const columnValues: Array<string | number> =
 			columnValuesList ||
 			(await this.getColumnValues(range, keyIndex, dataStartRowIndex, valueRenderMode));
 
 		const updateData: ISheetUpdateData[] = [];
 		const appendData: IDataObject[] = [];
 
+		const getKeyIndex = (key: string | number, data: Array<string | number>) => {
+			let index = -1;
+			for (let i = 0; i < data.length; i++) {
+				if (data[i]?.toString() === key.toString()) {
+					index = i;
+					break;
+				}
+			}
+			return index;
+		};
+
 		for (const item of inputData) {
 			const inputIndexKey = item[indexKey] as string;
+
 			if (inputIndexKey === undefined || inputIndexKey === null) {
 				// Item does not have the indexKey so we can ignore it or append it if upsert true
 				if (upsert) {
@@ -483,7 +495,8 @@ export class GoogleSheet {
 			}
 
 			// Item does have the key so check if it exists in Sheet
-			const indexOfIndexKeyInSheet = columnValues.indexOf(inputIndexKey);
+			const indexOfIndexKeyInSheet = getKeyIndex(inputIndexKey, columnValues);
+
 			if (indexOfIndexKeyInSheet === -1) {
 				// Key does not exist in the Sheet so it can not be updated so skip it or append it if upsert true
 				if (upsert) {