Strapi doesn't show any reaction if component fields (in my case a repeatable one) are set as required field, but were not filled with data or were not add/created at all. Steps to reproduce the behavior Create collection type with a component, which in my case contains a text field and a relation field Click on the created comonent inside your collection type -> advanced settings -> required field create your collection type entry and do NOT create a component or add values to it. Nothing will happen if you click on save! A workaround in my case would be to set the relational field inside the component as required, but this doesn't work either, because there has been an issue for a long time with this too #557 Expected behavior Some working input validation, which highlights the component/field and/or shows a message, that it is required. See: https://github.com/strapi/strapi/issues/10030