'migration to webpack 5 - Safari 10 error unable to delete property

Hi I have migrated project to webpack 5 but on safari 10 i get error as below. Could you help to sort it out?

      minimize: true,
      minimizer: [new TerserPlugin({
        terserOptions: {
          mangle: {
            toplevel: true,
          },
          safari10: true,
        },
      })],
    },

browsers list

last 2 versions
> 1%
not dead
Firefox ESR
IE 11
last 3 iOS major versions
Safari >= 10
iOS >= 10

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'migration to webpack 5 - Safari 10 error unable to delete property

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