# After Cluster Upgrade from 1.20 to 1.21, The Worker Nodes Are Losing Custom Labels. ## Problem Worker nodes losing custom labels after the cluster upgrade from 1.20 to 1.21. ## Environment * Platform9 Managed Kubernetes - v5.5. * Kubernetes version: 1.20. ## Answer * The custom labels are missing post the etcd corruption which happens due to missing etcd environment variables in the sunpike host objects and in the QbertDB nodes table associated with the master nodes. * This is a known issue, Platform9 Engineering team is currently working to resolve this issue. The upcoming PMK-5.10 release will provide the solution for this issue. ## Workaround The custom labels needs to be manually added to all the worker nodes as a workaround until the fix is available in PMK-5.10 release. ## Additional Information An Internal bug PMK-5829 has been filed to track this issue. Please open a support ticket mentioning the JiraID- PMK-5829 to get more information about the progress. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://platform9.com/kb/pmk/frequently-asked-questions/after-cluster-upgrade-from-1-20-to-1-21--the-worker-nodes-are-lo.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.