UoM issue after upgrade to OH 4.0.0 M3 with Number:Dimensionless item

Setup, Configuration and Use Runtime
21

I use a Netatmo weather station (Openhab 4.0.3) and the CO2 value show me “0 One”, i have tested
on metadata unit - Percent or % but that not work, what is the right one.

22

For Weather Company Binding, I used Metadata Unit Percent and State Description % and that worked for me.
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Thanks

23

For CO2 value is the right unit “ppm”, this is the solution for me.