You cannot be replaced!
There has never been anyone like you before … There is not anyone else like you right now … There will never be anyone like you in the future.
Because you are unique, God has made you just as you are for a specific purpose—
“This signature on each soul may be a product of heredity and environment, but that only means that heredity and environment are among the instruments whereby God creates a soul. I am considering not how, but why, He makes each soul unique. If He had no use for all these differences, I do not see why He should have created more souls than one. Be sure that the ins and outs of your individuality are no mystery to Him; and one day they will no longer be a mystery to you. The mold in which a key is made would be a strange thing, if you had never seen a key: and the key itself a strange thing if you had never seen a lock. Your soul has a curious shape because it is a hollow made to fit a particular swelling in the infinite contours of the Divine substance, or a key to unlock one of the doors in the house with many mansions. For it is not humanity in the abstract that is to be saved, but you.” (C.S. Lewis)