When attempting to install kivy, the message "ERROR: Could not find a version that meets the requirement kivy_deps.sdl2_dev~=0.4.5 (available versions: 0.5.1)" appears.

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This error occurs when the version of the kivydeps.sdl2dev package you are trying to install is not compatible with the other packages in your environment.

To resolve this issue, you can try the following steps:

1. Update pip to the latest version by running pip install --upgrade pip.

2. Install the required version of kivydeps.sdl2dev by running pip install kivy_deps.sdl2_dev==0.4.5

3. Try installing kivy again by running pip install kivy

If the issue still persists, you may need to update other packages in your environment to resolve any conflicting dependencies.