When editing forecast settings or the forecast category field in Salesforce Collaborative Forecasts, you may see the following error:
"You have at least one custom column defined in a forecast type. Delete your custom column or forecast type and try again."
This error occurs when a custom column exists on any forecast type, regardless of whether that forecast type is currently active. See the ForecastingColumnDefinition object reference for more on how custom columns are stored.
This article answers the question: how do I resolve the "custom column defined in a forecast type" error so I can edit my Collaborative Forecasts settings?
Salesforce blocks changes to forecast settings when any forecast type — active or inactive — still has a custom column defined on it. The custom column must be removed before the settings can be edited.
It's no longer possible to activate legacy forecast types. If the custom column is on a legacy forecast type, take the ID from the query above and run a delete directly on the ForecastingColumnDefinition record instead.
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