We do not use mail merges for our decisions, and have no mail merge templates configured. However, in the new decisions area, Mail Merge Template is required, and we are not able to edit anything else in the decisions because there is no template to select. Please make Mail Merge template optional.
Just adding my comment here for "hopefully" visibility. I have many schools who do not use mail merge for decisions. The system, prior to this release, did not require a mail merge template to be used. We are pushing decisions in two weeks so I would love to see this function optional again.