Block a single emoji

I've been getting really annoyed that for some reason every time I try to type a word with apostrophe after n (like didn't, couldn't) the nail polish emoji shows up in the predictions. The prediction shows like did[nail polish emoji] or could[nail polish emoji] as soon as I type the letter n at the end of the word. It's been like this for so long but it's something that really annoys me, because even if I long press and ask not to predict it again, it seems like it still shows up. I like having emoji predictive text available, but is there a way to prevent an individual emoji from coming up in predictions?