Notice: Undefined index: seo_meta in seo_meta_form_validate() (line 345 of /home/www/domain.com/modules/seo_meta/seo_meta.module).
Notice: Undefined property: Node::$seo_meta in seo_meta_node_update() (line 433 of /home/www/domain.com/modules/seo_meta/seo_meta.module).
Sometimes it happens on /admin/content:
Notice: Undefined index: seo_meta in seo_meta_form_validate() (line 345 of /home/www/domain.com/modules/seo_meta/seo_meta.module). Notice: Undefined property: Node::$seo_meta in seo_meta_node_update() (line 433 of /home/www/domain.com/modules/seo_meta/seo_meta.module).