As part of our ongoing effort to streamline Rock and reduce unnecessary database bloat, the GroupLocationHistoricalSchedule model and its corresponding database table have been permanently removed in v18.0.
This model was officially deprecated in v16.0.3, and all related code has now been fully removed from Rock. With no remaining dependencies, we’ve taken the final step of removing the table itself. Doing so helps reduce the size of your Rock database and improves overall performance and maintainability.
If your team hasn't used this model directly (which most won’t have), this change will be seamless. But if you’re unsure or have custom reporting or queries referencing that table, now’s the time to remove or refactor them before upgrading.