I'm getting this error while working with the REST API when attempting to create a TASK or STORY type issue and link it back to an epic in another project.
Is this expected?
I'm also noticing that in the UI, the parent dropdown doesn't autocomplete/automatically load epics outside of the project I am in. However, if I specify an epic key exactly, e.g. EPIC-519, it appears and it DOES allow me to save it.
So it appears the restriction is only on the API side.