Everywhere else Koha uses the 'copyrightdate' field from the suggestions table. When creating a new order from a suggestion the page tries to pull 'publicationyear' from the suggestions table, which always defaults to zero.
Katrin Fischer's patch for Bug 5090 fixes this bug as well. *** This bug has been marked as a duplicate of bug 5090 ***
*** Bug 4829 has been marked as a duplicate of this bug. ***