Foren / Cotonti / Support / 0.9.1.7 forumpost delete error

Version (Revision) 0.9.1 (r2040), fresh install. Post without a poll

Fatal error: Call to undefined function cot_poll_delete() in F:\xampp\htdocs\test\sienna\modules\polls\polls.forums.delete.php on line 20

Added 3 minutes later:

error pops up too when I try to delete a topic with poll