The way the card originally was worded could imply, out of context, that Carbidopa is genrally harmful to combine with levodopa. I think this better explains that Carbidopa just boosts levodopa in the CNS and that comes with all the good and bad of levodopa. That would make it a potential dupe with the other carbidopa card, but I think this would take preference over that if that is the case.
Also, there is a potential error. Amboss popup says that carbidopa does not even affect the CNS side effects.
https://next.amboss.com/us/article/Zm0ZVg?utm_source=navbar&utm_medium=anki&utm_campaign=anki&utm_term=carbidopa&guid=E%253CC%253C-kv%2525R_&aid=b566793c-3b1e-47e9-9c87-0f96072b21c8&uid=icxeJXvaa#Z024d8fb669fc9b7e82092338f3e0d015