Double bibliography

I do not know how, but it creates 2 bibliographies (one at the end of the file, where I want it to be) and another (whenever I try to add a new citation, right after where the citation is inserted). I do not know how to fix this problem. Is there a place where I can specify where I want the bibliography? (for example, at the end of the file?). I checked out the error report and I got this ID :631163093, but I do not know if it has anything to do with my problem or if it is another kind of problem.

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