Error while updating records with relations and group permissions

From directus created by nithinga : directus/directus#1658

Version Info

• Directus version and branch: version/6.4 - c6fb4336732530c8db58b76124262e027e191175
• PHP version: 7.1
• MySQL version: 5.7
• Web server: Apache
• OS name and version: Docker ( Ubuntu )

Expected Behavior

When adding the record with relations, it should be added properly.

Actual Behavior

When adding the record with relations, it gives the given error in screenshot.

Steps to Reproduce

1. Make 2 tables, eg: topics and books
2. Make 2 groups, topic-manager and book-manager. Give permissions like book-manger can enter book details under a topic, but he cannot edit, delete or add topics.
3. Login as book-manager and try to enter a new book detail. We will get the given screenshot error. This happends due to Directus trying to update all the relational tables, but donnot have permission. :( what is the need of trying to again update all relational tables ?

Logs or Screenshots