Installation of Enterprise Tier Generates Database Warnings

When you install the second tier (the Enterprise tier) of a two-tier MEP installation, two warnings appear near the end of the installation process, as a result of the execution of a deployRar and a deployWar target. The warnings look like this:

Command deploy executed successfully with following warning messages: WARNING:

JDO76614: Deployment encountered SQL Exceptions:
       JDO76609: Got SQLException executing statement "CREATE TABLE DBCREDENTIALS 
(USERNAME VARCHAR(255) NOT NULL, BACKENDUSERNAME VARCHAR(255), BACKENDPASSWORD 
VARCHAR(255), PRIMARY KEY (USERNAME))": java.sql.SQLException: Table 'dbcredentials' 
already exists

You can safely ignore these warnings.