Is it possible to change a constant variable value when using upgradeable pattern and deploying a new version?

Question

The title is pretty self explanatory.

Let's say I have a contract where I defined a constant variable and this contract is using some upgradeable pattern. When I deploy a new version of the contract, theoretically I can overwrite the constant's value, since that is baked into the bytecode.

Example:

1. First version of the contract:

contract MyUpgradeableContract {

   uint256 public constant ZERO_TO_BE_ONE = 0;

}

2. Contract after upgrade:

contract MyUpgradeableContract {

   uint256 public constant ZERO_TO_BE_ONE = 1;

}

Is this allowed in solidity with upgradeable pattern?

Answer 1

Yes, you can override the constant, as the value doesn't occupy any storage slot, but exists in the runtime bytecode, which is deployed in the new contract.