How can I copy files using the ansible.builtin.copy module and avoid conflicting file names?

I want files in the src directory to copy to the dest directory but I don't want the files with the same name to copy over. Does anyone know how I can do that?

- name: Copy files but not the ones that have the same name
  copy:
    src:  <src_dir>
    dest: <dest_dir>

Solution

Q: "Don't copy the files with the same name."

A: Set the parameter force to false. Quoting

If false, the file will only be transferred if the destination does not exist.

    - copy:
        src: /tmp/test/src/
        dest: /tmp/test/dest/
        force: false

^{Example.
Given the files
shell> tree /tmp/test/
/tmp/test/
├── dest
│   └── a
└── src
├── a
├── b
└── c

2 directories, 4 files

shell> cat /tmp/test/src/*
src
src
src

shell> cat /tmp/test/dest/*
dest

The playbook
- hosts: localhost
tasks:
- copy:
src: /tmp/test/src/
dest: /tmp/test/dest/
force: false

will copy the files b and c only because the file a exists
shell> tree /tmp/test/
/tmp/test/
├── dest
│   ├── a
│   ├── b
│   └── c
└── src
├── a
├── b
└── c

2 directories, 6 files

shell> cat /tmp/test/dest/*
dest
src
src}