# Mlcategory -1 in 7.12 **URL:** \ **Category:** Elasticsearch\ **Tags:** elastic-stack-machine-learning\ **Created:** [December 30, 2021, 3:02pm UTC](https://discuss.elastic.co/t/mlcategory-1-in-7-12/293212 "2021-12-30T15:02:55Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![evan2424](https://avatars.discourse-cdn.com/v4/letter/e/ecccb3/32.png) [@evan2424](https://discuss.elastic.co/u/evan2424)\ **Post date:** [December 30, 2021, 3:02pm UTC](https://discuss.elastic.co/t/mlcategory-1-in-7-12/293212/1 "2021-12-30T15:02:55Z")
We are using Elastic Stack 7.12, and have set up some machine learning jobs. When we visit the Anomaly Explorer for one of these jobs, there is a **mlcategory -1** that does not have any category examples. I have tried running `GET /_xpack/ml/anomaly_detectors/job_id/results/categories` But there the first mlcategory is 1, and there is no mlcategory -1 in that list. Could mlcategory -1 be a category with log entries where the categorization field is empty? ---
**Author:** ![droberts195](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/droberts195/32/17692_2.png) [@droberts195](https://discuss.elastic.co/u/droberts195)\ **Post date:** [December 30, 2021, 3:36pm UTC](https://discuss.elastic.co/t/mlcategory-1-in-7-12/293212/2 "2021-12-30T15:36:32Z")
> [@evan2424](#): > > Could mlcategory -1 be a category with log entries where the categorization field is empty? Yes, that’s right. Or the field was not present at all in a particular document. ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [January 27, 2022, 3:37pm UTC](https://discuss.elastic.co/t/mlcategory-1-in-7-12/293212/3 "2022-01-27T15:37:00Z")
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