Please help with changing the sequence of citations

I am using Vancouver style and I am not able to add new citations in the already written paragraph, when i am adding the whole set of numbering of citations as well as bibliography changes.. I have a para like ..
“ fractures have a varied etiology (1) like osteoporosis (2), trauma(3) .
Now if I am adding another word like “ cancer” in between osteoporosis and trauma.
It’s coming like


“ etiology ( 2) like osteoporosis(1) cancer (2) trauma (3)
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