[HELP]Why is ctrl+u pressed once, but executed twice?

Plugins
1

I defined the shortcut ctrl+u in the plugin to insert block, but every time I press ctrl+u,insertblock is executed twice and two strings are inserted, is there any way to solve it?

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const shortcutKey_dupBlock = "ctrl+u";

logseq.App.registerCommandShortcut(
  {
    binding: shortcutKey_dupBlock,
  },
  async ({ uuid }) => {
    await logseq.Editor.insertBlock(uuid, "testing", {before: true,isPageBlock:true });
});