If it really isn’t in use anywhere, then yes, I think so. Especially as it is misleading. (Since as you said, both it and P. indica have yellow flowers)
Or, from the curator guidelines:
I don’t know. It seems like a loophole that technically wouldn’t violate the guidelines, but in practice it is not much different. I think the point of common names is that they are common.
That being said, someone had to have invented common names, so if the common name from that paper becomes more widely used, then I see no problem.
Edit: Perhaps we should apply some Research-Grade logic to common names and only add them, if there are two (mor or less independent) different sources reporting/using it?