What happened?

The printer is displaying the message: The model was sliced for a different printer model, please reslice.

Error name: Printer model mismatch warning

Error code: #10705

How to fix it?

The SL1 only reads .sl1 files that are exported by PrusaSlicer. If you have sliced a model for another printer, or in another slicer, please reslice it in PrusaSlicer.