Minify failed: "preserve_lines" is not a supported option

[voaneves]

Trying to minify JS, always this warning "preserve_line is not an option. My current JS configs:

"minify.js": {
    "mangle": true,
    "compress": {
      "sequences": true,
      "properties": true,
      "dead_code": true,
      "drop_debugger": true,
      "unsafe": false,
      "unsafe_comps": false,
      "conditionals": true,
      "comparisons": true,
      "evaluate": true,
      "booleans": true,
      "loops": true,
      "unused": true,
      "hoist_funs": true,
      "keep_fargs": true,
      "keep_fnames": false,
      "hoist_vars": false,
      "if_return": true,
      "join_vars": true,
      "collapse_vars": false,
      "reduce_vars": false,
      "side_effects": true,
      "pure_getters": false,
      "pure_funcs": null,
      "negate_iife": false,
      "drop_console": false,
      "passes": 1,
      "global_defs": {}
    },
    "output": {
      "ascii_only": false,
      "inline_script": false,
      "max_line_len": 32000,
      "braces": false,
      "semicolons": true,
      "comments": false,
      "shebang": true,
      "preamble": null,
      "quote_style": "best"
    }
  }

There's no preserve_line on the settings.json. What should I do?

[gasparrisoft]

Go to VS Settings JSON file. Select all configuration lines. Ctrl+x. Than save the file. Paste the memory back. Go back to your file and minify once again. You will see the message going away

[voaneves]

It indeed went away. Thanks