What is required to prevent filters from a linked dashboard from passing into global filters?

Locking a global filter is essential to prevent filters from a linked dashboard from affecting the overall analysis across all dashboards. When a global filter is locked, it ensures that the filter settings remain consistent and unchanged, regardless of any actions taken in linked or individual dashboards. Therefore, any filters applied in dashboard views will not adjust the global filters or the data representation across other linked views.

This mechanism is particularly beneficial in analytics environments where users need to maintain control over their dashboard settings without inadvertently altering the global context, ensuring that the intended data insights remain intact. A locked global filter thus acts as a safeguard against unwanted interference from linked dashboard filters.

The other choices involve actions that either do not address the specific need to lock a global filter or involve creating a new dashboard or deleting filters, which does not fulfill the requirement presented in the question.