Failed to load the css-edit-groups package

[Enter steps to reproduce:]

1. ...
2. ...

Atom: 1.45.0 x64
Electron: 4.2.7
OS: Microsoft Windows 10 Enterprise
Thrown From: css-edit-groups package 0.4.2

Stack Trace

Failed to load the css-edit-groups package

At Duplicate key 'cmd-l'

Error: Duplicate key 'cmd-l'
    at Object.r (<embedded>:11:582573)
    at addProperty (<embedded>:14:1413065)
    at Array.reduce (<anonymous>:null:null)
    at Obj (<embedded>:14:1412731)
    at transformNode (<embedded>:14:1414105)
    at Value (<embedded>:14:1411979)
    at transformNode (<embedded>:14:1414105)
    at addProperty (<embedded>:14:1413053)
    at Array.reduce (<anonymous>:null:null)
    at Obj (<embedded>:14:1412731)
    at transformNode (<embedded>:14:1414105)
    at Value (<embedded>:14:1411979)
    at transformNode (<embedded>:14:1414105)
    at Block (<embedded>:14:1411937)
    at transformNode (<embedded>:14:1414105)
    at Object.parse (<embedded>:14:1414126)
    at m (<embedded>:11:579816)
    at c (<embedded>:11:580022)
    at Object.readFileSync (<embedded>:11:581115)
    at keymaps.getKeymapPaths.map.e (<embedded>:11:3331261)
    at Array.map (<anonymous>:null:null)
    at Package.loadKeymaps (<embedded>:11:3331249)
    at measure (<embedded>:11:3324703)
    at Package.measure (<embedded>:11:3323898)
    at Package.load (<embedded>:11:3324639)
    at PackageManager.loadAvailablePackage (<embedded>:11:381026)
    at config.transact (<embedded>:11:379449)
    at Config.transact (<embedded>:11:331514)
    at PackageManager.loadPackages (<embedded>:11:379387)
    at t.loadState.then (<embedded>:1:742323)

Commands

     -0:07.4.0 application:open (atom-workspace.workspace.scrollbars-visible-always.theme-one-dark-syntax.theme-one-dark-ui)

Non-Core Packages

aligner-css 1.2.1 
atom-css-clean 2.24.1 
atom-live-server 2.3.0 
atom-live-server-plus 3.0.1 
autocomplete-html-entities 0.2.0 
css-color-name 0.4.0 
css-comb 2.5.0 
css-edit-groups 0.4.2 
css-from-html 0.1.5 
css-grid-snippets 1.1.1 
css-helper-snippets 0.3.0 
css-hyperclick 0.1.5 
css-in-js 1.4.0 
css-skeleton-maker 0.1.4 
css-snippets 1.1.0 
css-specificity 0.2.2 
css-spy 0.6.0 
css-triggers 1.0.2 
emmet-jsx-css-modules 1.0.0 
html-elmfier 0.7.0 
HTML-escaper 0.1.0 
html-head-snippets 0.2.0 
html-img 0.4.0 
html-includes 0.3.0 
html-presets 1.1.2 
html-shorcuts-react 3.0.3 
html-tab 1.0.2 
html-tag-auto-complete 0.1.1 
html-template-generator 0.3.0 
html-to-css 0.2.2 
html-to-elm 0.2.0 
html-to-jsx 2.0.3 
html-to-less 1.2.2 
html-wrapper 0.2.0 
ide-css 0.3.3 
ide-html 0.6.0 
ide-php 0.7.18 
json-to-html 0.2.4 
language-b-html 1.0.0 
markdown-to-html 0.5.0 
materialize-css 0.5.1 
php-cs-fixer 4.1.1 
php-debug 0.3.5 
pretty-html 1.0.0 
puddletown-css-snippets 1.1.0 
sort-css 0.3.0 
uglify-html 2.0.0 

Start by reproducing the css-edit-groups 0.4.2 load failure in Atom 1.45.0 on Windows 10 and inspect the package's keymap configuration for the reported duplicate cmd-l entry. Done means the package loads without the duplicate-key error while preserving the intended keybinding behavior.