FYI: Here’s how to post code on the forums: Using code tags properly
The error tells you exactly what the problem is and it’ll tell you exactly what line/column it’s on too
“other” doesn’t exist.
The above code looks like it was copied from an OnCollision method without understanding what the code does etc. I can only guess that maybe you meant to use:
if (collidermush.CompareTag("Mush"))