, these will appear with a "defective" status. You may need to contact Siemens Technical Support to restore them. Unintended Logging Features : Sometimes this error appears because a feature that logging is enabled by mistake. Historical data > Data logs in the TIA Portal project tree and delete any unused logs. GMP (Audit Trail)
If you do not actually need to save historical data and only want to clear the error message, you can disable the logging functions in your project. license key not available wincc logging for runtime advanced
This article provides a deep dive into the causes of this error and offers a step-by-step guide to permanently resolve it. , these will appear with a "defective" status