Oracle Solution for Error ora-23340

ORA-23340: incorrect resolution method string

What triggered the Error:

User function is specified when conflict resolution method was not "USER FUNCTION" or specified resolution method is not one of the predefined methods.

What should we do to fix it:

user function is specified when conflict resolution method was not "USER FUNCTION", either reregister function with method as "USER FUNCTION" or specify a NULL user function. Otherwise Specify one of the documented supported conflict resolution methods.