✨ Copy data on execution only if needed

packages/nodes-base/nodes/Dropbox/Dropbox.node.ts

@@ -627,10 +627,21 @@ export class Dropbox implements INodeType {
 			}
 
 			if (resource === 'file' && operation === 'download') {
-				// TODO: Has to check if it already exists and only add if not
-				if (items[i].binary === undefined) {
-					items[i].binary = {};
+
+				const newItem: INodeExecutionData = {
+					json: items[i].json,
+					binary: {},
+				};
+
+				if (items[i].binary !== undefined) {
+					// Create a shallow copy of the binary data so that the old
+					// data references which do not get changed still stay behind
+					// but the incoming data does not get changed.
+					Object.assign(newItem.binary, items[i].binary);
 				}
+
+				items[i] = newItem;
+
 				const dataPropertyNameDownload = this.getNodeParameter('binaryPropertyName', i) as string;
 
 				const filePathDownload = this.getNodeParameter('path', i) as string;