Toolio introduced offering level Lock Forecast functionality in addition to the choice level Lock Forecast controls.
By default, the system copies calculated forecast results into Adjusted Metrics so you can continue planning with system-recommended outputs, but you may want to manually edit these results for certain use cases. To prevent the system from overwriting your changes, you can enable the Lock Forecast checkbox and save. Forecasts can be locked at either the choice level or the offering level by navigating to the Offering Set tab and adding the Lock Forecast attribute, giving you granular control for individual clusters. Once locked, future executions of the Forecast function will preserve your edited Adjusted Sales Plan and system calculations will no longer be applied.

Read more about Lock Forecast on this help article.