When deploying the appliance without creating a database, the default password changes.
If you deploy in the Web Console without creating an initial database, the deployment fails due to password validation error. If you deploy in JSON without creating an initial database, you must reset the password.
Hardware Models
Oracle Database Appliance X7-2S, X7-2M, X7-2L, X7-2-HA
Oracle Database Appliance X6-2S, X6-2M, and X6-L
Workaround
Create a database when you deploy.
If you deploy without creating a database, change the password manually on all nodes after deploying.