How do I fix a "Mismatched entity and/or field definitions" error on my configuration?

I’m getting the following error on my Drupal 8 configuration page.

Entity/field definitions
Mismatched entity and/or field definitions
The following changes were detected in the entity type and field definitions.

Content
Update the node.rng_capacity field.
Update the node.rng_registrants_duplicate field.
Update the node.rng_registration_groups field.
Update the node.rng_registration_type field.
Update the node.rng_reply_to field.
Update the node.rng_status field.

I’m not sure what caused these issues or how to go about resolving them. I think they may be leftover fragments/elements from when I deleted a registration or entity type.

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How do I fix a "Mismatched entity and/or field definitions" error on my configuration?

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