Meta Data Showing after plugin removal

Hi there,
We had to disable the Route plugin on our client’s site. After removing the plugin, it seems meta data is showing on Admin Order details for old orders (https://gyazo.com/aed8be77c2383fe85314ad60cd723d3a) – creating new orders doesn’t seem to have any meta data attached to it. However, the client is looking to see if it will pose any issues with this old meta data showing up and if it can be removed easily on these past orders.

Any information is greatly appreciated!

Thanks!