node index.js step returns syntax error

[Georgedude]

george@debian:~/LD-ToyPad-Emulator$ node index.js undefined:11 ]5": 4026531839 ^

SyntaxError: Unexpected number in JSON at position 208 at JSON.parse () at initalizeToyTagsJSON (/home/george/LD-ToyPad-Emulator/index.js:140:25) at Object. (/home/george/LD-ToyPad-Emulator/index.js:27:1) at Module._compile (internal/modules/cjs/loader.js:816:30) at Object.Module._extensions..js (internal/modules/cjs/loader.js:827:10) at Module.load (internal/modules/cjs/loader.js:685:32) at Function.Module._load (internal/modules/cjs/loader.js:620:12) at Function.Module.runMain (internal/modules/cjs/loader.js:877:12) at internal/main/run_main_module.js:21:11

Any ideas what I can do to solve this? I've had a look in the index.js file for the mentioned ]5" with ctrlF but no luck, but I'm also not knowledgeable on the topic so I'm sure I'm misunderstanding something

Edit 1: Of note, I couldn't find the loader.js file at all, is that unusual?

Edit 2: Fixed the issue but leaving up as others seem to have had similar issues; The problem was at server/json/toytags.json, when making a new toy tag it messed up writing it to this file and made the syntax go bad, I went into the file and removed the bad syntax and it's now running as normal