Fix launch not found error

This commit fixes launch not found error while switching from modified
launch config tab to new launch config tab.

Fixes : #2003

Author: SougandhS

debug/org.eclipse.debug.ui/ui/org/eclipse/debug/internal/ui/launchConfigurations/CreateLaunchConfigurationAction.java

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2000, 2011 IBM Corporation and others.
+ * Copyright (c) 2000, 2025 IBM Corporation and others.
  *
  * This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License 2.0
@@ -61,6 +61,11 @@ protected void performAction() {
 			// Construct a new config of the selected type
 			if (object instanceof ILaunchConfiguration config) {
 				try {
+					if (!config.exists()) {
+						ILaunchConfiguration[] launches = DebugPlugin.getDefault().getLaunchManager()
+								.getLaunchConfigurations();
+						config = launches[launches.length - 1];
+					}
 					type = config.getType();
 				} catch (CoreException e) {
 					errorDialog(e);