Change pop up menu values from existing records to value list?
Hey everyone, when I first started using FileMaker I was newer at it, so I have some fields like Customer Type which are pop up menus, but for the value list I chose the "Use values from field Customer_Type", so there's values like Customer A, Customer B, Customer C etc. Problem is that now if you have just 1 customer with Customer C and you delete that record, it of course removes Customer C as an option.
I'd prefer to instead of using values from the tables, do the "Use Custom Values" under Edit Value List and just list them all as all my new pop up fields are like that. The question is if I change it from User values from Field, to Use Custom Values and then list them all, will my data be okay and be preserved? Or will it wipe all the values or potentially lose them? Just don't want to lose those records so wanted to check first. Thanks!