To change or remove parameters, or to rename a function replication definition, use the drop function replication definition command to drop it. Then re-create it. The syntax for this command is:
drop function replication definition function_rep_def
When you drop a function replication definition, the associated user-defined function and function string are also dropped. Subscriptions to a function replication definition must be dropped first. You can re-create the subscriptions after you re-create the function replication definition.