Describe the bug

When trying to load FNaS Solar Switchup's data.win file, UndertaleModTool refuses to open it because "An item with the same key has already been added. Key: 0 at 0000A788 while reading chunk SHDR".

Reproducing steps

1. Open UndertaleModTool
2. Load the Solar Switchup data.win file
3. Error comes up as soon as it starts loading

Setup Details

1. 0.6.1.0 and Bleeding Edge e1f5d22
2. Windows 11
3. Five Nights at Sonic's: Solar Switchup