Here is another famous: How do I?
I have two sources, one called NEHGS and the other called NEHGS Other.
I assigned NEHGS as the master source when I created one citation, and later decided it should be NEHGS Other. So I changed the Master Source in the Citation Manager for that citation. Then, all the citations that used NEHGS changed to NEHGS Other. (Thankfully, less than 10 citations and I know which citations to worry about.)
Time for me to go fix this. How do you properly change a citation from one master source to another?
My Master Sources are all free form, not interested in templates.