# What does this mean?

**URL:** <https://forum.makecode.com/t/what-does-this-mean/43289>\
**Category:** Help\
**Tags:** extension\
**Created:** [April 13, 2026, 6:29pm UTC](https://forum.makecode.com/t/what-does-this-mean/43289 "2026-04-13T18:29:17Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![CodingGrizzlyBear](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.makecode.com/codinggrizzlybear/32/14838_2.png) [@CodingGrizzlyBear](https://forum.makecode.com/u/CodingGrizzlyBear)\
**Post date:** [April 13, 2026, 6:29pm UTC](https://forum.makecode.com/t/what-does-this-mean/43289/1 "2026-04-13T18:29:17Z")

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> **[Error????](https://arcade.makecode.com/S25709-82308-73536-25985)**
>
> Made with ❤️ in Microsoft MakeCode Arcade.

I was testing my new extension and idk a dozen errors popped up

 ![image](https://us1.discourse-cdn.com/flex020/uploads/makecode/original/3X/a/8/a8c17f099b749b903e691e99bff7bd93a1110a04.png)

 ![image](https://us1.discourse-cdn.com/flex020/uploads/makecode/original/3X/f/3/f359722055e2e748c251903f8bc1620dc0c78207.png)

 ![image](https://us1.discourse-cdn.com/flex020/uploads/makecode/original/3X/7/3/7397c6e1de408e9f214194fb76fa9f14503275fe.png)

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**Author:** ![NeverStopTheCoder](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.makecode.com/neverstopthecoder/32/21194_2.png) [@NeverStopTheCoder](https://forum.makecode.com/u/NeverStopTheCoder)\
**Post date:** [April 13, 2026, 6:37pm UTC](https://forum.makecode.com/t/what-does-this-mean/43289/2 "2026-04-13T18:37:32Z")

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it means somewhere mySprite2 was created and you are trying to recreate it

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**Author:** ![WoofWoof](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.makecode.com/woofwoof/32/32523_2.png) [@WoofWoof](https://forum.makecode.com/u/WoofWoof)\
**Post date:** [April 13, 2026, 9:45pm UTC](https://forum.makecode.com/t/what-does-this-mean/43289/3 "2026-04-13T21:45:25Z")

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This is happening because both your extension and your project contain the tilemap and assets files, causing certain variables to be duplicated. To stop these files from downloading when you add your extension, go to the json file, click “Edit as Text”, and remove the highlighted files:

 ![Screenshot 2026-04-13 at 3.50.45 PM](https://us1.discourse-cdn.com/flex020/uploads/makecode/original/3X/5/d/5d983aa0be211bc48934f6f8445e17cf69d122ce.png)  
Yours should look a bit different, but the file names are the same.

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<div class="post-metadata">

**Author:** ![CodingGrizzlyBear](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.makecode.com/codinggrizzlybear/32/14838_2.png) [@CodingGrizzlyBear](https://forum.makecode.com/u/CodingGrizzlyBear)\
**Post date:** [April 13, 2026, 11:02pm UTC](https://forum.makecode.com/t/what-does-this-mean/43289/4 "2026-04-13T23:02:15Z")

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Never mind i fixed it, thanks.

I finished the extension too!

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<div class="post-metadata">

**Author:** ![NeverStopTheCoder](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.makecode.com/neverstopthecoder/32/21194_2.png) [@NeverStopTheCoder](https://forum.makecode.com/u/NeverStopTheCoder)\
**Post date:** [April 14, 2026, 4:27pm UTC](https://forum.makecode.com/t/what-does-this-mean/43289/5 "2026-04-14T16:27:10Z")

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yeah usually I delete the two tilemap one because they cause problems in the Json file because I’m pretty sure that means this is part of your extension