Take a look at the current implementation of the contracts migrate function here.
The migrate function sets the contract version using cw2::set_contract_version, but it does not check the current version of the contract before performing the migration. This would be wrong if the version its being set to is already the current version or can even lead to issues if the migration is attempted from an incompatible or newer version of the contract.
Without checking the current version of the contract using get_contract_version, there is a risk of setting the contract to the same version or even worse, attempting to migrate from a newer version to an older version; which is generally not advisable and can cause loss of functionality or data.
Use the get_contract_version function to retrieve the current version of the contract before performing the migration. Then ensure that the migration is only performed if the current version is older than the new version being deployed.
Pseudo fix:
