Explanation:
A user attempts to connect to the database system under a user name which was defined with EXCLUSIVE in a <CREATE USER>, <CREATE USERGROUP>, <ALTER USER>, or <ALTER USERGROUP statement>. Another user has connected using this name.
User Action:
Wait until the other user has disconnected using a <RELEASE statement>.
To enable a user to have various simultaneous connects, NOT EXCLUSIVE must be specified for this user with the <ALTER USER> or <ALTER USERGROUP statement>. These SQL statements may only be executed by the owner of the user or usergroup.