To delete the existing metadata key in Bytebeam console,
1

Access Settings Tab

Navigate to the Settings Tab by clicking on your username at the top right
2

Go to Metadata Tab and Initiate Metadata Key Deletion

Navigate to the Metadata tab and click on the trash(🗑) icon against the target metadata key
3

Fill Details

Enter the metadata key name and click on Submit button to delete the metadata key
When a metadata key is set as a serial key, it cannot be deleted until the serial key is unset.