New spell of "Other" Lore cannot be created

[strusik01]

Describe the bug
I've encountered strange bug while creating spells. If the new spell's Lore is left as "Other", it cannot be saved and created. It has be marked as any other Lore, then edited to Other.

To Reproduce
Steps to reproduce the behavior:

1. Go to 'Compendium'
2. Click on 'Spells'
3. Click on a '+' icon
4. Type anything in 'Name' field
5. Make sure the spell's Lore is set to "Other" by default
6. Click on 'Save'

Expected behavior
The spell is correctly saved and created in Compendium.