Did CreateFromTemplate change?

createFromTemplate has apparently changed over the weekend.  We use it extensively in our customizations.  Our code has worked fine for several years, and today I'm getting an error {"errorCode":"DuplicateKey","message":"CreateFromTemplate Operation failed Reason: Link between objects already exists.\r\n","

the code has not changed since it was working last week, but now it doesn't work.  Does anyone know how we might be able to resolve this?