I'm able to reproduce the 'error pasting data: foreign key ...'
1. Download the urd file from
https://www.dropbox.com/s/bponofyugf...-data.urd?dl=0
2. Verify option / 'split text on separator is checked'
3. Verify options / text separator value is null
4. Go to info item 'Testing split errors' & drag its contents to tree root 'My Data'
5. Should get the error
Thanks