TYPO3 Core

Deleting a record will also delete all records, which are configured as type inline (field, list) within.

In some cases you will show child records has type inline, but to disable the deletion of some child records.
An example are Customers with orders as type inline for display reason (Easier access).
Deleting the customer should not delete his orders, which will work without an existing customer since all relevant data will be stored within the order record itself like address etc.

I attached a patch which in my optionen solves this issue.