Add troubleshooting for 'Failed to pack new cache' error (#3419)

* Add troubleshooting for 'Failed to pack new cache' error

Added troubleshooting section for 'Failed to pack new cache' error during builds, including description and solution steps.

* Refine troubleshooting steps for cache path duplication

Consolidate troubleshooting steps for cache path errors and provide YAML example.

* Apply suggestions from code review

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

* Potential fix for pull request finding

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

* Potential fix for pull request finding

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

---------

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

Author: tirth-patel-nc

content/troubleshooting/common-issues.md

@@ -184,4 +184,37 @@ Before modifying client-side configurations, perform maintenance on the server s
 - Consider implementing regular repository maintenance as part of your workflow
 - Monitor your repository size and perform cleanup periodically
 
-{{< /collapsible >}}
+{{< /collapsible >}}
+
+
+### "Failed to pack new cache" error during builds
+
+###### Description
+During a build (cleanup step), you may encounter the following error while the cache is being saved:
+
+```
+Failed to pack new cache
+```
+
+{{<collapsible title="Solution" id="duplicate-cache-defined-solution" >}}
+###### Solution
+The most common cause of this error is having duplicate cache paths defined in your workflow configuration.
+
+To resolve this:
+- Review your workflow cache configuration and check for duplicate path entries and ensure the same directory is not listed multiple times.
+
+```yaml
+workflows:
+  example-workflow:
+    cache:
+      cache_paths:
+        - ~/.gradle/caches
+        - ~/.gradle/caches
+```
+
+- Remove any duplicate cache path entries.
+- Save the workflow configuration and trigger a new build.
+
+After removing duplicate cache paths, the build should complete successfully without the caching error.
+
+{{< /collapsible >}}