Oracle® Database 11g / 12c / 18c error codes ORA-12490: DBHIGH cannot be lowered

ORA-12490: DBHIGH cannot be lowered

Oracle Error Code: ORA-12490

Cause: You attempted to enter a value for DBHIGH that did not dominate the existing value of DBHIGH.

Action: Enter a value for DBHIGH that dominates the old value.