When preparing to convert your app to a project database, the project database will forcibly turn on the "Allowed nested transactions" and will no longer be allowed to be disabled. To make sure your transaction logic stays consistent between binary and project mode, make sure your 4D app has the nested transaction setting enabled and assure that each coded transaction is intentional and not redundantly placed. To help check transactions levels, use the command Transaction level to distinguish between a single transaction vs nested transactions.