PYTHON-5002 Add guard to synchro hook to accidental overwrite #1245

Job	Run time
Build wheels for manylinux_x86_64	2m 15s
Make SDist	29s
Build wheels for manylinux_aarch64	10m 41s
Build wheels for manylinux_ppc64le	9m 50s
Build wheels for manylinux_s390x	11m 18s
Build wheels for manylinux_i686	2m 47s
Build wheels for win_amd6	5m 1s
Build wheels for win32	6m 14s
Build wheels for macos	4m 33s
Download Wheels	6s
	53m 14s

Provide feedback