[Mailman-Users] New mailman instance

Hello: I have an instance of mailman 2 on a red hat server that has been running without problems for a long time. Now I need to set up a test environment. I have cloned that server and I have modified the mmcfg.py removing the name of the old lists and I have put the name of the new list, as well as in postfix. The problem that arises is that when creating a new list, the alias.db, alias and virtual-mailman.db files are autogenerated but NOT the virtual-mailman file. Any ideas?.

Thank you so much for your help.