A large financial institution is planning to upgrade its customer database system. Following best practices, the change management team has created a detailed plan, communicated with relevant stakeholders, and scheduled a time for the migration that minimizes impact on clients. What is the MOST important next step to ensure the security and continuity of operations during this change?
Run a series of tests in the production environment prior to migration.
Document the change in the organization's change log.
Temporarily increase the level of security monitoring on the database system.
Conduct a complete backup of the current customer database.