Was any one able to resolve this issue?

Grandfather tables are tables that are created in older licensing model

so, 1. Go to change task form 2. right click on configuration item field and choose configure dictionary 3. check reference specification section 4. check if the ci you are  wanting to update is meeting the criteria in the reference qualifier secti...

You can configure which role can upload attachments.  https://docs.servicenow.com/bundle/london-platform-administration/page/administer/form-administration/task/t_DisablingTheDragAndDropFeature.html#t_RequiringARoleToAttachFiles

I tried this and it exactly gave me the same error. Tried to update the change task with a CI that did not meet the reference qualifier conditions.  Check if the CI you are trying to update meets the qualifier conditions for CI field on change task t...