"Program terminated with a trap: 'attempt to subtract with overflow'

[mikenike360]

Playing around with the tamagotchi contract and app. Once the tamagotchi stat gets to 8 or below I start getting this error and the whole apps locks up. However if the stat is above 8 then the wallet transaction processes like normal.

8000: Runtime error: "Program terminated with a trap: 'attempt to subtract with overflow', /home/mikenike/dapps/contracts/tamagotchi/src/lib.rs:51:24"

[Madib036]