Schema errors for FIELD_NAME.settings.placeholder missing schema.

Problem/Motivation

Problem with field config on Drupal 11.

Steps to reproduce

1. Add a new field with type bigint
2. Can see the warning message
Schema errors for core.entity_form_display.media.audio.default with the following errors: core.entity_form_display.media.audio.default:content.field_test.settings.placeholder missing schema. These errors mean there is configuration that does not comply with its schema. This is not a fatal error, but it is recommended to fix these issues. For more information on configuration schemas, check out the documentation.
Schema errors for core.entity_view_display.media.audio.default with the following errors: core.entity_view_display.media.audio.default:content.field_test.settings.thousand_separator missing schema, core.entity_view_display.media.audio.default:content.field_test.settings.prefix_suffix missing schema. These errors mean there is configuration that does not comply with its schema. This is not a fatal error, but it is recommended to fix these issues. For more information on configuration schemas, check out the documentation.

Proposed resolution