How can I uninvited this person?

My sister and I are inviting my best friend, her best friend, and one of our other mutual friends to an amusement park this weekend. All of a sudden, I found out that my best friend and my sister and I’s mutual friend don’t get along. I want to uninvited our mutual friend because the whole reason I planned this was... show more My sister and I are inviting my best friend, her best friend, and one of our other mutual friends to an amusement park this weekend. All of a sudden, I found out that my best friend and my sister and I’s mutual friend don’t get along. I want to uninvited our mutual friend because the whole reason I planned this was so I can hang out with my best friend who i haven’t seen in a while. I really also like my mutual friend and i don’t want to hurt her feelings and idk what to do.
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