SQL Error when creating New Forums/ child forums

[jlynx]

Whenever i want to create a new Forum or child forum this error pops up -->  error 1364 Field 'xthreads_tplprefix' doesn't have a default value. Nothing i do wants to work. I searched the php files for xthreads_tplprefix database insert but found nothing. In the Xthreads options of creating the forums i add prefixes but still shows the same error. I'm using xthreads 1.63 and MyBB 1.6.13. Is this a bug or what ?