UserRoleAssignment entityTypeId+entityObjectId now required

this table only stores entity-dependent roles,
independent roles are stored in the JHipster table JHI_USER_AUTHORITY

README.md

@@ -309,6 +309,36 @@ Once everything works again, we can push our new version:
 
     git push
 
+#### 5. General Aftermath
+
+Think about which additional code could be effected by your JDL-changes!
+Files which are not at all in the `jhipster-generated` branch, don't show conflicts even though they might need changes.
+
+Here some examples for amendments to be done:
+
+-   in `historicization_*.xml`: the columns or their constraints
+-   `sampledata/*.xml/csv`
+
+If you find more of such general cases, please add them here!
+
+#### 6. Special Aftermath for new
+
+Because we have added quite some functionality, after introducing new entities, there is a lot more to amend.
+Here some issues to consider:
+
+-   add sample-data for the new entity
+-   internal (Angular) frontend: add table filters
+-   internal (Angular) frontend: amend input fields for multiline, if applicable
+-   internal (Angular) frontend: check if dates are properly formatted
+-   \*Mapper: add displayLabel for entity itself and parents
+-   DTOs: add access-right annotations with customized JSON serializer/deserializer
+-   Validator: implement entity-based validator and call it in the generated service
+-   external API: add new type to client library
+
+WARNING: This list is most likely incomplete. Pleas add any new found issue!
+
+For many of these issues look for HOWTO-commits in git or HOWTO comments in the source code.
+
 ### Generating the Table of Contents for Markdown
 
 This README file contains a table of contents generated by _doctoc_.