Default List Layout columns are not saving after being modified.Issue When attempting to create a new default list layout, and navigating to configure list layout. After updating the columns and hitting saving, the changes are not maintained.ReleaseAllCause1. The issue was caused by hundreds of duplicate records, created by different users, where in the sys_ui_list table for the where the table, associated parent field, and default view had empty user fields. These duplicates created conflicts, preventing the list layout from saving correctly. 2. The presence of multiple records with empty user fields (instead of a single default record) led to instability in the list configuration process.Resolution1. Identify and delete all duplicate records in the sys_ui_list table where there are duplication of the columns for table, parent, view, and where the user column field is empty/null. 2. Ensure only one record with an empty user field exists for the respective table and view to resolve conflicts. 3. Verify that the list layout can now save as the default after removing duplicates. ex.