How to make an old picture your current picture on facebook on an iphone?

I have an iphone and I want to make an old picture my new picture but how do you do it without making a duplicate?

Have you Used it in the Past as a Profile Picture? If So Go to the Picture than Go to Options than Click on Set as Profile Picture and it Won't Make a Another Picture

However if you Have Not Used it in The Past it will Have to Make a New Picture in the Profile Pictures Album No Way To Make a Profile Picture Without Adding a New One if it Has Not Been Used Already

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