# Mapping issue when creating ML job **URL:** \ **Category:** Elasticsearch\ **Tags:** elastic-stack-machine-learning\ **Created:** [September 9, 2019, 3:31pm UTC](https://discuss.elastic.co/t/mapping-issue-when-creating-ml-job/198728 "2019-09-09T15:31:30Z")\ **Posts on this page:** 1\ **Showing post:** 2
**Author:** ![richcollier](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/richcollier/32/115035_2.png) [@richcollier](https://discuss.elastic.co/u/richcollier)\ **Post date:** [September 9, 2019, 7:36pm UTC](https://discuss.elastic.co/t/mapping-issue-when-creating-ml-job/198728/2 "2019-09-09T19:36:02Z")
Seems like you've had this problem before, but resolved it back then? > [@Machine Learning broke somehow](https://discuss.elastic.co/t/machine-learning-broke-somehow/132100): > > Sorry about the topic, but I honestly have no clue what is the issue. I was using Elastic stack 6.2.2, had four ML jobs and they were running fine. Then I was adding a new job, and got this error immediately when I clicked save job: Save failed: [mapper\_parsing\_exception] Failed to parse mapping [doc]: mapper [keywords] of different type, current\_type [text], merged\_type [ObjectMapper] Updated the whole stack from 6.2.2 to 6.2.4, same result, but now the old jobs didn't start to work. The… --- _[View the full topic](https://discuss.elastic.co/t/mapping-issue-when-creating-ml-job/198728)._