Best Practice: New list, what to do with the old one?

[kunruh]

Standard Expense Platform.

I have updated configuration from 2 single level lists to a 2 level connected list.

The single level lists have been hidden from users.  I cannot rename these to indicate their retirement as updating field labels is unavailable. Is a best practice to delete single level lists in Standard or just leave as-is? Is there anything else I should be considering?

Thank you!

[KevinD]

@kunruh from what I read in our Knowledge Base, you shouldn't delete the Custom Field as this would result in an irreversible loss of data. In fact, Concur no longer is allowed to delete custom fields on behalf of a customer. 

So, best practice would be to leave things as they are with the old lists being hidden from view for users.