I find the following information on DB2 administrator guide book, but I am not sure it will work or not?!!!
Procedure 4. Add a data set: If the object supported is user-defined, use the access method services to define another data set.
The name of the new data set must continue the sequence begun by the names of the existing data sets that support the object.
The last four characters of each name are a relative data set number: If the last name ended with A001, the next must end with
A002, and so on. Also, be sure to add either I or J in the name of the data set.