Oracle Error Message
ORA-12851: PARALLEL_MAX_SERVERS must be greater than or equal to PARALLEL_MIN_SERVERS, string
Reason for the Error
An attempt was made to set the PARALLEL_MAX_SERVERS parameter to a value less than PARALLEL_MIN_SERVERS.
Solution
Set PARALLEL_MAX_SERVERS to a value greater than or equal to PARALLEL_MIN_SERVERS value specified in the accompanying message and retry.