[Koha] Error when adding new authorities record

[ksorbo]

Using Koha 17.11, Ubuntu 16

I am getting an error when I attempt to add a new authorities record:

1. On the biblio cataloging page, click the button next to 650 a tag to add
a topical subject tracing
2. Pops up search for authority, nothing found
3. Click create authority
4. On authorities record, fixed length 001 003 005 008, autopopulate
5. Enter new term in 450 a - Click save.
6. It asks if this is  a duplicate (the term shown in the duplicate message
is completely different than the one being added)
7. Click No Save as New Authority
Error:
*Can't call method "subfields" on an undefined value at
/usr/share/koha/intranet/cgi-bin/authorities/blinddetail-biblio-search.pl
line 86.*

Am I getting this error because I am failing to enter something I should be
entering in the new authorities record?



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