Solidity versions 0.8.20 and 0.8.24 are both used in the smart contract.

Vulnerabilities may not be severe, especially at the moment, but OpenZeppelin may stop support for the previous version thereby putting a smart contract with the older version at risk.

There may be issues (possibly in the future) with compiling a single Smart contract with different versions of Solidity, and exposure to vulnerabilities because bugs in recent earlier versions may have been squashed in recent versions.

Slither

I recommend the latest version of OpenZeppelin packages be used if available or use the same version of solidity even if it requires downgrading to a more popular earlier version supported and still in use by OpenZeppelin