Answer
Rather than fully disabling Personal Profiles for these users, which is uncommon and can produce exactly this kind of conflict since some screens expect to reconcile a personal profile against the base profile's controlled changes, leave Personal Profiles enabled but instead revoke the specific permissions that let users make profile changes themselves — for example allowing harmless personalization like creating their own Favorites/Shortcuts, while explicitly disallowing things like Navigator changes or Layout changes. This achieves the same practical goal, users can't override base-profile-controlled layout/column changes, without disabling Personal Profiles outright, and avoids the specific error this disabled-personal-profile configuration was producing on that screen.