how to clean up my filter options?

[eeps24]

I have a pivot table chart, when I click on the filter button, the below screen shot opens up. My question is, the things I have circled no longer exist in my data. I removed these values, however they still show up in my filter options. How do I remove these permanently?

*yes I know I misspelled december

Capture.PNG

[eeps24]

nevermind , figured it out. pivot table options under data tab.