org-agenda + [a] generated many duplicated task entries

[Christopher M. Miles]

When I execute command "org-agenda" with key "[a]" to generate
org-agenda day view. Many task entries are duplicated.

Does anyone knows any related Org mode options caused this problem or
how to fix this issue.

I tried many methods trying to figure out the problem reason.

- [X] Emacs init bisect
- [X] Org mode git check out old commits
- [X] init-org-agenda.el options reset
- [X] Emacs minimal init testing -> no problem

My Emacs, Org mode environment:

- GNU Emacs 30.0.50 (build 2, aarch64-apple-darwin23.3.0, NS appkit-2487.40 
Version 14.3 (Build 23D5033f)) of 2024-01-12
- Org mode version 9.7-pre (release_9.6.6-426-gba1033 @ 
/Users/stardiviner/Code/Emacs/org-mode/lisp/)
- My Org mode version is using latest "main" branch (commit: f22be2878)

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[ stardiviner ]
I try to make every word tell the meaning that I want to express without 
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